Water!

William is so busy these days, he's always got to be doing something. And he doesn't walk anywhere, nope he has to run! My latest way to keep him entertained for long period's of time?

Give him 2 or 3 buckets, and the hose, only just turned on. He will spend ages filling the buckets up and watering the garden, concrete and everything else, including himself. For some reason he loves to try to drink from the hose too. Good thing its Summer!