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Item 1 of 12


Average rating4.5out of 5 stars

Earn Double VIP Points on the super-cool Technic™ Catamaran.


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Kids can recreate the thrill of boat racing with this super-cool LEGO® Technic™ (42105) Catamaran toy. For the first time ever, this LEGO Technic model toy floats on water! So, sailing enthusiasts can learn while they play. See how the sails work. Or how the dagger boards maximise stability and how the rudder steers. With the classic 2-hull catamaran design, this model boat is a fantastic recreation of the real thing. Learn how to build and sail an awesome toy boat Build… rebuild… play… display... There’s so much for kids to discover with this LEGO engineering toy. Have fun building the Catamaran – inspired by real race boats. Then set it in the bathtub to recreate speed sailing adventures before rebuilding into a Race Power Boat. If you're looking for toy boats that really float, this set is a great choice. Unique toys and immersive building experiences LEGO Technic sets are ideal for LEGO fans looking for a new challenge. They offer an advanced building experience for kids and adults who enjoy learning new engineering skills – or simply love to build.
  • Take to the water with this racing Catamaran floating toy sailboat. Packed with realistic features, it includes 2 sails, 2 dagger boards and rudder.
  • Ideal for developing engineering skills, this 2-in-1 model sailboat kit lets kids build, play and rebuild, giving an introduction to how boats really work.
  • Master the tactics of a world-class speed-sailor. Angle the sails for the ultimate racing position. Raise and lower the 2 dagger boards to maximize stability. Then use the rudder to steer.
  • Looking for the best gifts for a toy boat fan? This LEGO® Technic™ Catamaran (42105) is a great choice. Designed for ages 8+, it’s ideal for LEGO fans looking for a new challenge, or for anyone with a passion for sailing.
  • At over 12” (32cm) long, 8” (22cm) wide and 17” (44cm) high (from the bottom of the rudder to the top of the mast), this model sailboat is made for easy handling in the bathtub.
  • Who needs batteries when you've got sails? Certainly not this LEGO® Catamaran! It's powered by imagination, so no batteries are required.
  • Get building straightaway with full instructions for the Catamaran in the box. Ready to build the Race Power Boat? You’ll find extra instructions for this online.
  • Young LEGO® fans can discover a whole new world of building fun with LEGO Technic™ plastic model kits. With cool vehicle designs and realistic functions, the action goes on long after the model is built.
  • LEGO® building bricks are designed to the highest industry standards. LEGOTechnic™ building kits are consistent, compatible and connect easily every time.
  • LEGO® Technic™ pieces go through robust testing to make sure every building set meets the highest global safety and quality standards.
Building Instructions
  • Free standard 3 to 5 business day shipping on all merchandise orders over $35!
  • Express shipping available at checkout.
  • Custom parts orders are sent separately from merchandise and take additional time to process and deliver.
  • Unopened merchandise may be returned for a full refund within 90 days of receipt of your order.
Some exclusions apply. Visit our Deliveries and Returns page for more information.

Customer Reviews

Overall RatingAverage rating4.5out of 5 stars
(2 Reviews)
100% would recommend this product.


Overall Experience

Play ExperienceAverage rating2out of 5 stars
Level of DifficultyAverage rating2out of 5 stars
Value for MoneyAverage rating4out of 5 stars
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  • in 1 day
    Average rating4out of 5 stars
    Good for displaying in water... but that’s it.
    | 25-34
    I would recommend this to a friend!
    Purchased for: Son
    I purchased this set for my son, who is 4 but has a basic idea of Lego’s. Now, that being said I purchased the yellow single hull boat when it was out and thought it was pretty cool. I was even more excited for a boat that would float. I feel it’s a bit misleading. Between the points where the steering fins attach to the boat there is an open hole. So if you were to play with this in a bath tub to any degree the hulls will take on water and sink. That’s my only gripe. Otherwise it was a cool build and can be displayed along with the other sailboat if you can build a cradle for it to sit on with the stabilizers tucked all the way in. Not disappointed, but not impressed. The other green speedboat released in the Lego city line takes on water too. Should’ve been one piece hulls. Oh well, maybe next time.

    Response from LEGO SHOP

    March 13, 2020
    Samuel, LEGO Customer Service
    We're constantly looking to improve our sets and having your feedback is super helpful, thank you for taking the time to write the review. We wish you happy sailing!
    Play ExperienceAverage rating2out of 5 stars
    Level of DifficultyAverage rating2out of 5 stars
    Value for MoneyAverage rating3out of 5 stars
    Build Time: 1 hrs
    Building Experience: Expert LEGO builder
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  • in 12 days
    Average rating5out of 5 stars
    FINALLY an accurate sailboat model!
    | 45-54
    I would recommend this to a friend!
    Purchased for: Self
    As a sailor and a Lego fan, I am super impressed with this model, especially when compared to the previous attempts at sailboats. First, the floating aspect is awesome. Finally it gives us a REAL hulls that floats! The amas are actually very modern, cutting edge even. Reverse plumb bow is amazing. Mast and sails are much more in ratio to real boats. The mechanics are really novel with adjustable centerboard heights and individual sail trim. I suspect the designer is the same as with previous sailboats and finally got to build what s/he wanted. The best part for me, and worst for some, is that it is designed to be FLOATED and not displayed. I can see a ton of new MOCs coming from the new pieces introduced in this set. It is not an advanced set but it is a great representation of what a modern racing catamaran would look like. I plan to try to do some fun rebuilds that were not possible until this set. How about a HARD sail for that boat. Lego lends itself to hard sails very nicely

    Response from LEGO SHOP

    January 16, 2020
    Samuel, LEGO Customer Service
    Exactly, love the positivity! It's the first time we've introduced a Technic­™ boat that floats on water. Awesome, right? We can't wait to see our fans get creative and build MOCs with the newly introduced pieces. Thank you for your review and we wish you happy sailing!
    Value for MoneyAverage rating5out of 5 stars
    Building Experience: Expert LEGO builder
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