A fun building experience for monster truck fans with a 2-in-1 model. The LEGO Technic Monster Jam Dragon truck transforms into a Crocodile sand runner. The set includes edgy, dragon-like details, including spikes and horns. Decorated with realistic graphics and colors, kids can play out their favorite scenes from the Monster Jam arena. 2-in-1 model for even more play When kids are ready for something new, they can build this 2-in-1 Monster Jam truck into a Crocodile sand runner. With the pull-back engine, children can race with the truck, and they can also perform tricks seen in the real Monster Jam arena. A great introduction to engineering LEGO Technic building models feature realistic movements and structures that introduce LEGO builders to the world of engineering in an approachable and realistic way. Get ready for a simple and intuitive building adventure with the LEGO Builder app! In the app, kids can zoom in and rotate 3D versions of models, save kits and track their progress.