Kids aged 7+ who love Monster Jam™ have lots to discover with this LEGO® Technic Monster Jam Dragon™ (42149) pull-back truck toy. It comes with awesome dragon details like spikes and horns. With realistic graphics and colours, this toy truck model lets kids recreate favourite scenes from the Monster Jam arena. \A 2-in-1 toy for even more play. When kids are ready for something new, they can rebuild this 2-in-1 toy Monster Jam truck into a Crocodile Monster Truck model. The pull-back action lets kids race their truck and recreate the tricks they’ve seen in the real Monster Jam arena. A great introduction to engineering. LEGO Technic buildable models feature realistic movement and mechanisms that introduce LEGO builders to the universe of engineering in an approachable and realistic way. Get ready for an easy and intuitive building adventure with the LEGO Builder app. Here kids can zoom in and rotate models in 3D, save sets and track their progress.