Explore the exciting world of robotics with the 4M KidzLabs Robotic Hand Kit. This educational science kit contains all the parts needed to create a functioning artificial hand. Pulling the attached cords cause the hand's thumb and fingers to clench in a realistic gripping motion. Details: Multicolor 8.5" x 2.5" x 6.75" No batteries required Detailed assembly instructions included For ages 8 and up