Very good
The advantages of this toy are: good quality. However, I am disappointed because: small parts.
Retailer prices for 31020 are sorted by the latest lowest price.
Retailer pricesPrice history 31020
We check Dutch retailers every day. This graph shows the full daily-low price series we have for this set.
Daily lowest price tracked across 2 Dutch retailers. The dotted line marks LEGO's recommended retail price.
Source: daily measurement at 2 Dutch retailers, 16 Dec 2025 – 31 May 2026. RRP via LEGO.com.
| Date | Price | Retailer | Stock |
|---|---|---|---|
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock | |
| €56,25 | Special Bricks | In stock |
Calibrated forecast based on historical pricing, seasonal patterns and retailer behavior. Tuned conservatively: rather cautious than optimistic.
Stronger signal than most sets in this theme. Waiting is a reasonable strategy.
31020 by the numbers: price, stock and history.
For LEGO Twinblade Adventures (31020), we track 1 retailer in the Netherlands, with 1 currently in stock. The current lowest price is €56,25. Use price history and stock data to judge whether this is a good time to buy.
Spin the massive rotors of the powerful 3-in-1 Twinblade aircraft! This Twinblade aircraft is literally revolutionary! Spin the rotor blades and take off like a helicopter. Then rotate the engines 90 degrees and power forward like an airplane while the dual tail fin ensures steady flight. With its red and white coloring and engine exhaust details, the Twinblade is easy to spot high in the sky. Back on the ground, use the ramp to access the cargo hold, and when you want a new challenge, rebuild it into an old-fashioned biplane or a speedy helicopter. 3-in-1 model: rebuilds into a biplane or helicopter Features turning engines, large spinning rotor blades, dual tail fin, engine exhaust detail, cargo hold and a ramp Adjust the engines for lift-off or smooth forward flight Lower the ramp to access the cargo hold The Twinblade aircraft measures over 2" (6cm) high, 6" (17cm) long and 7" (19cm) wide The biplane measures over 2" (7cm) high, 6" (17cm) long and 7" (18cm) wide The helicopter measures over 2" (7cm) high, 7" (19cm) long and 2" (6cm)
All about this set
Background, build experience, collector context, and buying notes in one story.
For LEGO Twinblade Adventures (31020), we track 1 retailer in the Netherlands, with 1 currently in stock. The current lowest price is €56,25. Use price history and stock data to judge whether this is a good time to buy.
Spin the massive rotors of the powerful 3-in-1 Twinblade aircraft! This Twinblade aircraft is literally revolutionary! Spin the rotor blades and take off like a helicopter. Then rotate the engines 90 degrees and power forward like an airplane while the dual tail fin ensures steady flight. With its red and white coloring and engine exhaust details, the Twinblade is easy to spot high in the sky. Back on the ground, use the ramp to access the cargo hold, and when you want a new challenge, rebuild it into an old-fashioned biplane or a speedy helicopter. 3-in-1 model: rebuilds into a biplane or helicopter Features turning engines, large spinning rotor blades, dual tail fin, engine exhaust detail, cargo hold and a ramp Adjust the engines for lift-off or smooth forward flight Lower the ramp to access the cargo hold The Twinblade aircraft measures over 2" (6cm) high, 6" (17cm) long and 7" (19cm) wide The biplane measures over 2" (7cm) high, 6" (17cm) long and 7" (18cm) wide The helicopter measures over 2" (7cm) high, 7" (19cm) long and 2" (6cm)
The current lowest price is €56,25 across 1 tracked retailers.
Instructions & specifications
Dimensions, pieces, build steps, and the official PDF building instruction.
Parts inventory
Known set data around pieces and build context.
Plates Round Curved and Dishes
Plate Round 1 x 1 with Solid Stud
Part ID 6141 · Flat Silver
Qty 18
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)
Part ID 4032a · Black
Qty 3
Plate Round 1 x 1 with Solid Stud
Part ID 6141 · Trans-Red
Qty 2
Plate Round 1 x 1 with Solid Stud
Part ID 6141 · Trans-Green
Qty 2
Plate Round 1 x 1 with Solid Stud
Part ID 6141 · Flat Silver · Spare
Qty 1
Plate Round 1 x 1 with Solid Stud
Part ID 6141 · Trans-Red · Spare
Qty 1
Plate Round 1 x 1 with Solid Stud
Part ID 6141 · Trans-Green · Spare
Qty 1
Plates
Plate 1 x 4
Part ID 3710 · Black
Qty 13
Plate 1 x 2
Part ID 3023 · Dark Bluish Gray
Qty 7
Plate 2 x 2
Part ID 3022 · Light Bluish Gray
Qty 6
Plate 1 x 1
Part ID 3024 · Yellow
Qty 6
Plate 2 x 3
Part ID 3021 · Dark Blue
Qty 4
Plate 1 x 2
Part ID 3023 · Red
Qty 4
Plate 2 x 6
Part ID 3795 · White
Qty 4
Plate 2 x 4
Part ID 3020 · Red
Qty 3
Plate 1 x 2
Part ID 3023 · Trans-Yellow
Qty 3
Plate 2 x 2 Corner
Part ID 2420 · Dark Bluish Gray
Qty 2
Plate 2 x 12
Part ID 2445 · White
Qty 2
Plate 2 x 4
Part ID 3020 · White
Qty 2
Plate 2 x 4
Part ID 3020 · Dark Blue
Qty 2
Plate 2 x 3
Part ID 3021 · Black
Qty 2
Plate 1 x 3
Part ID 3623 · Red
Qty 2
Plate 1 x 3
Part ID 3623 · White
Qty 2
Plate 1 x 6
Part ID 3666 · Red
Qty 2
Plate 1 x 6
Part ID 3666 · White
Qty 2
Plate 1 x 6
Part ID 3666 · Dark Bluish Gray
Qty 2
Plate 1 x 4
Part ID 3710 · Red
Qty 2
Plate 4 x 4
Part ID 3031 · Light Bluish Gray
Qty 1
Plate 4 x 4
Part ID 3031 · Red
Qty 1
Plate 2 x 8
Part ID 3034 · Red
Qty 1
Plate 2 x 6
Part ID 3795 · Light Bluish Gray
Qty 1
Plate 2 x 10
Part ID 3832 · Dark Bluish Gray
Qty 1
Plate 1 x 1
Part ID 3024 · Yellow · Spare
Qty 1
Bricks Round and Cones
Cone 1 x 1 [Top Groove]
Part ID 59900 · Light Bluish Gray
Qty 8
Cone 1 x 1 [Top Groove]
Part ID 59900 · Black
Qty 2
Tiles
Tile 1 x 6 with Groove
Part ID 6636 · Black
Qty 6
Tile 1 x 1 with Groove
Part ID 3070b · White
Qty 2
Tile 1 x 6 with Groove
Part ID 6636 · White
Qty 2
Tile 2 x 4 with Groove
Part ID 87079 · Dark Blue
Qty 2
Tile 1 x 1 with Groove
Part ID 3070b · White · Spare
Qty 1
Bricks Curved
Slope Curved 2 x 1 No Studs [1/2 Bow]
Part ID 11477 · Red
Qty 4
Brick Curved 2 x 4 x 1 1/3
Part ID 6081 · Dark Bluish Gray
Qty 2
Slope Curved 4 x 2 No Studs
Part ID 93606 · Light Bluish Gray
Qty 2
Brick Curved 2 x 2, Two Top Studs
Part ID 30165 · Red
Qty 1
Bricks
Brick 1 x 4
Part ID 3010 · Red
Qty 4
Brick 1 x 2
Part ID 3004 · Red
Qty 2
Brick 1 x 1
Part ID 3005 · White
Qty 2
Brick 1 x 2 without Bottom Tube
Part ID 3065 · Trans-Brown
Qty 2
Plates Special
Plate Special 1 x 2 with Door Rail
Part ID 32028 · Black
Qty 4
Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring]
Part ID 4081b · Black
Qty 4
Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib]
Part ID 10247 · Light Bluish Gray
Qty 2
Bracket 1 x 2 - 2 x 2
Part ID 44728 · Red
Qty 2
Plate Special 1 x 2 with Handle on End [Closed Ends]
Part ID 60478 · Light Bluish Gray
Qty 2
Bracket 1 x 2 - 2 x 2 Inverted
Part ID 99207 · Light Bluish Gray
Qty 2
Bracket 1 x 2 - 1 x 2
Part ID 99781 · Light Bluish Gray
Qty 2
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised
Part ID 99206 · White
Qty 1
Bricks Sloped
Slope Inverted 34° 3 x 1 with Internal Stopper
Part ID 4287b · Red
Qty 4
Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]
Part ID 3660 · Dark Bluish Gray
Qty 2
Slope Inverted 33° 3 x 2 [Connections between Studs]
Part ID 3747b · Light Bluish Gray
Qty 2
Slope 30° 1 x 2 x 2/3
Part ID 85984 · Red
Qty 2
Slope 45° 2 x 2
Part ID 3039 · Black
Qty 1
Technic Bricks
Technic Brick 1 x 1 with Pin Hole
Part ID 6541 · Light Bluish Gray
Qty 4
Technic Brick 1 x 2 [1 Pin Hole]
Part ID 3700 · Light Bluish Gray
Qty 2
Tiles Special
Tile Special 1 x 2 Grille with Bottom Groove
Part ID 2412b · Black
Qty 3
Tile Special 2 x 3 with 2 Clips [Thick Open O Clips]
Part ID 30350b · Dark Bluish Gray
Qty 1
Wheels and Tyres
Wheel Skateboard / Trolley
Part ID 2496 · Black
Qty 3
Transportation - Land
Wheel Holder, Plate, Round 2 x 2 Thin with Clips
Part ID 2655 · Light Bluish Gray
Qty 3
Plates Angled
Wedge Plate 3 x 3 Cut Corner
Part ID 2450 · White
Qty 2
Wedge Plate 4 x 2 Right
Part ID 41769 · Dark Blue
Qty 2
Wedge Plate 4 x 2 Left
Part ID 41770 · Dark Blue
Qty 2
Wedge Plate 2 x 4
Part ID 51739 · White
Qty 2
Wedge Plate 3 x 2 Right
Part ID 43722 · Red
Qty 1
Wedge Plate 3 x 2 Left
Part ID 43723 · Red
Qty 1
Wedge Plate 2 x 4
Part ID 51739 · Light Bluish Gray
Qty 1
Technic Pins
Technic Pin with Friction Ridges Lengthwise and Center Slots
Part ID 2780 · Black
Qty 2
Technic Axle Pin without Friction Ridges Lengthwise
Part ID 3749 · Tan
Qty 1
Technic Pin with Friction Ridges Lengthwise and Center Slots
Part ID 2780 · Black · Spare
Qty 1
Bricks Special
Brick Special 1 x 2 with Grille
Part ID 2877 · Dark Bluish Gray
Qty 2
Brick Special 1 x 1 with Headlight
Part ID 4070 · Dark Bluish Gray
Qty 2
Technic Special
Technic Plate Rotor 3 Blade with Smooth Ends and 6 Studs (Propeller)
Part ID 32125 · Light Bluish Gray
Qty 2
Technic Bushes
Technic Bush
Part ID 3713 · Red
Qty 2
Technic Bush
Part ID 3713 · Red · Spare
Qty 1
Technic Axles
Technic Axle 4 with Stop
Part ID 87083 · Dark Bluish Gray
Qty 2
Windscreens and Fuselage
Windscreen 3 x 4 x 1 1/3 with 2 Studs on Top
Part ID 2437 · Trans-Brown
Qty 1
Bricks Wedged
Wedge Curved 6 x 4 Triple
Part ID 43712 · White
Qty 1
Slope 45° 3 x 4 Double / 33°
Part ID 4861 · White
Qty 1
Retailer reviews
Summarized retailer review data when available.
The advantages of this toy are: good quality. However, I am disappointed because: small parts.
As always on bol.com! Fast, correct, good price, nice packaging. Super.
My nephew (9 years old) thought it was a very fun set. The birthday gift was a complete success.
Some parts are not very sturdy. Overall, this is a fun set for the price.
My grandson received this airplane for Christmas, and he is very enthusiastic about LEGO. This airplane was a great addition to his collection.
Not only the three models from the booklet are already built, but also all sorts of other vehicles, robots, figures, and buildings can be made with this set. Very fun!
you can play for a little while with one design, then transform it into another one , then the third one. my grandson is five, and simply adores Lego, he's been doing it since 3 1/2.
Excellent set for kids. The models are of size 9-10 inches. The propellers in the models rotate.
Very nice set.It's contains very clear instruction booklet for each of the models. All the parts that you'll need in order to build the models plus some extra tiny pieces.My 4 Y/O can follow up the instruction easily, he builds one of the models then dissemble it and start all over again with a different model. He can sit for hours at a time with one set.My 3 Y/O on the other hand, can't follow the instruction but do like to play with the parts imaginary games, not much you can build with those other than what's it meant to unless you have more Lego's sets.
As always, Lego sets are fantastic for constructive play, and much appreciated by the recipients (kids and grown-ups alike!)
What can I say- this isn't a big or complicated built but if you have an hour or so you want to kill this is good classic lego fun and for under $15 you can't go wrong. Easy way to add some nice pieces to your collection even if you don't want to build what is on the box. Includes separate instruction booklets for all 3 build options. Will NOT fit a mini-figure once complete. Does have an opening cargo door in back.
All retailer prices
Current prices, stock and discounts per retailer.
Price context
Lowest, highest and average price for this set.
This context is based on 101 price points across 1 retailers. The chart on the page remains the full interactive source.
Price forecast
Conservative baseline for the next period.
Waiting is a reasonable strategy: the signal is stronger than many comparable sets.
FAQ & set details
Pieces, year, RRP and retailer coverage.
Quick answers about price, stock and set data.