Boys and girls aged 7 and up can look forward to high-speed adventures with this toy motorcycle. Kids will have a blast building this LEGO® Technic Yellow Motorcycle (42225). Then it's time for action: they can test the steering and explore the workings of the 3-piston engine. This STEM building set is a great gift idea for kids who enjoy building and playing with toy vehicles. The realistic movements and mechanisms of LEGO Technic sets introduce young LEGO builders to the world of engineering in an accessible and lifelike way. Kids can build with confidence using the LEGO Builder app, which allows them to zoom in, rotate their model in 3D, and track their progress with easy-to-follow digital instructions. The set contains 151 pieces. MOTORCYCLE MODEL BUILDING SET – The LEGO® Technic Yellow Motorcycle (42225) building set provides hours of fun for boys and girls aged 7 and up who love toy vehicles STEERING AND ENGINE – This toy motorcycle features working steering and a 3-piston engine connected to the rear wheel by a chain STEM BUILDING SET – With this building set, kids can see how different parts of a motorcycle work, giving them a fun understanding of engineering concepts while developing new STEM skills ACTION-PACKED FUN – Spark the imagination of young car enthusiasts by letting them build, explore, and play with this motorcycle building set GIFT IDEA – This LEGO® Technic motorcycle is a great gift idea for a child's birthday or a small surprise for boys and girls aged 7 and up DISCOVER MORE SETS – Discover even more action-packed fun with the range of LEGO® Technic sets (sold separately) featuring realistic movements and mechanisms to inspire young builders A FUN BUILDING EXPERIENCE – The LEGO® Builder app guides kids on an intuitive building adventure. They can save sets, track their progress, zoom in on models, and rotate them with 3D instructions while building DIMENSIONS – The motorcycle in this 151-piece set measures over 3 in. (8 cm) high, 6 in. (16 cm) long, and 2 in. (6 cm) wide