Monster truck fans unleash arena-sized thrills with the LEGO Technic Monster Jam Grave Digger Fire and Ice (42219) building set. This STEM building set lets young builders construct the iconic Grave Digger Fire and Ice 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 features authentic details from the real Grave Digger Fire and Ice truck with fire and flames on one side and an icy design on the other. Kids can create their own imaginary Monster Jam events and adventures with this pull-back vehicle. 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 263 pieces.