Wood and hydraulics combine into a robotic kit that can be built in an hour. Exciting hands-on exploration of hydraulics. Everything you need to build is included: Precut wood pieces, plastic hydraulics, and easy-to-follow instructions. 10x7.5x2" box" Ages 8+ with adult interaction. Hands-on learning at its best. Building models decreases stress and increases focus, organization, and spatial, and fine motor skills.