Children expand their STEM skills and explore how sunlight can be converted to electrical energy with this easy-to-use kit! Kids just use the materials from the kit to build a hybrid rover that can explore the outdoors using the power of the sun—or batteries! Kit includes 36 pieces needed to assemble the robot, plus a detailed assembly guide. Robot body measures 5 1/4" long. Requires 1 “AAA” battery (not included).