The water seesaw will fascinate children and invite hours and hours of construction play. The water seesaw is a fine transporter of water and sand, leading materials from one end to the other when inclined. This trains children's construction play skills as well as their logical thinking. Adding transportation of materials to sand-and-water play was always an attraction. Here, having the possibility to shift materials through the long tube, children will be able to play in bigger groups together. This trains cooperation, negotiation and turn-taking skills. These are all social skills that are hard to teach, but easy to learn in play.