Hydraulic engineering at work Introduce your child to the marvels of engineering with our global bestseller Smartivity HydroBot. Watch your child's face light up with pride as they manouevre the crane's movement around 2 axes, and lift objects with the claspable jaw, all operated through simple syringes filled with water. Let science do all the heavy-lifting! Age: 8+ Inside the box wooden parts elastic bands components step-by-step illustrated construction manual learning activities