A neighbor was throwing away this amazing piece of packaging styrofoam. They seemed a bit mystified as to what we might want to do wth it but where happy to part with it before the garbage truck arrived. We got it home and I filled it with food coloring and water then provided Gwen with a big bowl of water and a cup then left her two it, watching from a distance.
A lot of these sorts of activities are hit and miss, I'm still not sure what she'll enjoy and what can be dropped in a moment in favor of something wildly more facinating. This one was a hit, she spent a good hour mixing colours, adding water and swirling things around. And she kept coming back to it all day. By the next day the play was more about breaking it up, standing in it and watching little specs of styrofoam float around, by the third day she was over it, but it was fabulous while it lasted.