What walks down stairs, alone or in pairs, and is wet. It’s the Water Slinky!  No, seriously, this is a thing.  What happens when it rains, or if someone was to wash their car and a cascade of water begins to come down a large staircase in large bursts of water, a sloshy bit of fun can occur. I give you… the water slinky!  And for more science geekery, check out the Weird World of Water Mythbusters kit