Harness The Power Of The Sun And Make A Rover Robot With The 4M Green Science Solar Hybrid Power Rover Robot Kit. Powered By Solar Energy Or Battery, The Rover Robot Moves When Sunlight Shines On Its Solar Cells Or Switch On To Battery Mode When There’S Not Enough Sunlight. Build This Unique Hybrid Solar-Powered Rover Robot And Watch It Move And Roll Along On Smooth Surfaces. Put Together All The Parts For The Rover Robot. Simple And Easy Instructions Are Included In The Kit. All You Need To Add To This Kit Are 1 Aaa Battery And A Cross-Head Screwdriver To Get The Fun Started. Curious And Inquisitive Young Ones Will Enjoy Discovering Fun In Science With This Kit. . . . . .