The Lego Technic Monster Jam ThunderROARus Pull-Back building toy is for girls and boys who love monster truck playsets, vehicles and dinosaur toys. Pull the truck back and then release it to recreate the thrills of the Monster Jam arena with fast-action tricks and stunts. This building set offers lots of play potential as boys and girls develop their building skills. This Lego monster truck makes a fun gift idea for boys and girls who love pull-back car toys.