The Gears! Gears! Gears! Rover Gears building kit allows your little inventors to create an almost endless variety of rovers that really roll. The 43 pieces snap together easily, and allow for open-ended play. Specially designed to help little minds practice and develop STEM and critical thinking skills. This entry point into the best-selling Gears! line of toys is fully compatible with all other Gears! sets. Collect them all and watch your child's creations come to life!