From beginner-friendly models to advanced designs, like a wagging-tail dog, running beetle, walking crab, surf, zombie chaser, etc., kids can build, rebuild, and develop hands-on engineering skills while exploring endless creative possibilities. 14-in-1 Solar Robot Kit – Build 14 different robots from one STEM solar robot kit with gears, wheels, shafts, and plates. ️ Solar & Battery Dual Power – Powered by sunlight outdoors or one AAA battery indoors (battery not included).