Kids unleash arena-sized thrills with the LEGO Technic Monster Jam Sparkle Smash (42220) building toy for boys and girls ages 7 years old and up. This STEM building set lets young builders construct the iconic Sparkle Smash unicorn monster truck featuring pull-back action that launches the truck into high-speed stunts and tricks. Builders can pull back the truck and watch it race forward to recreate exciting Monster Jam arena moments. This truck toy captures authentic details from the real Sparkle Smash truck with sparkling stars and an iconic unicorn horn for eye-catching styling. Kids can create their own imaginary Monster Jam events and adventures with this pull-back vehicle. Makes a fun birthday present or holiday treat for kids who love Monster Jam trucks and STEM toys. LEGO Technic sets feature realistic movements and mechanisms that introduce young LEGO builders to the universe of engineering in an approachable and realistic way. The LEGO Builder app includes digital tools that let kids track progress, zoom in and rotate models using 3D instructions. Contains 243 pieces.