Have a blast — with two piston-powered splash blasters you build yourself! Construct a pump tube to suck up water, then press the plunger to spray your friends. Swap in different splash disk pieces to change up the blast pattern and experiment with single-stream blasts, multi-spray blasts, and more. Play a variety of blaster games, then get pumped about pumps and learn all about the science behind your blaster. Water you waiting for?