Build your very own wooden mechanical hand by following easy and step-by-step instructions. From depicting the bones to spotting ligaments and tendons, this is a biology lesson that is never getting boring for them. Learn about the concepts of Biomimicry, Human Hand Anatomy, and Momentum Transfer along the way. Trusted by parents and loved by kids in 30+ countries. Every Smartivity toy goes through months of extensive research and testing before launch; carefully crafted by a team of toy designers, and tested by children, parents, & STEM experts.