What do you get when you cross a marble run with bathtime? This great idea for "water runs" made with PVC pipe from the hardware store.Maiz at The Brooding Hen came up with the idea to take different shapes of PVC pipe and turn them into pieces that suction cup to the bathtub wall. Kids can pour water through them and create waterfalls, or line up a whole bunch and see whether you can create a water run.
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(Image: Maiz Connolly/The Brooding Hen)