A noodle sprinkler
In this picture, we can see that somebody poked several holes in a woggle, and then stuck a hose in it to make a great sprinkler system. It turned out to be a blast for that kid.
As you can see, kids will have a lot of fun with water woggles, whether someone has made a game out of it for them or if they made a game for themselves. It may have something to do with the colors and versatility of the woggles.