Lou started to play with it first. To begin, she built a little house with some trees. She kept adding on to it, and after about half an hour the foam pieces started talking with one another. Apparently they were part of a circus.
Then Maisy joined in and built the circus train.
Eventually, the girls started to put some of the piece back into the bowl because they wanted to play with them outside. The squiggles had then transformed from clowns to mermaids and were apparently swimming.
Mina had no interest in playing with these, but it could have been because she was tired. Lou played with them for about an hour though, before I had to stop the fun because it was getting out of hand as the hose came into play.