Assemble your very own smart robot with this fun mechanics kit by 4M. With the Smart Robot Fun Science Kit you can build a moving robot that 'intelligently' changes direction when it encounters an obstacle. Watch the smart robot speed around your house, turning left or right like magic as it bumps into walls or obstacles. For even more experimental fun you can make a maze to see if the smart robot can escape. The Smart Robot Fun Science Kit from Educational Toys Planet includes full instructions and all parts needed to complete your brainy robot. The robot building kit requires one AA battery, not included.