OK a bit messy, but lots of fun! Make your own edible finger paint for the kids. Its cheap to make and safe to use and if theres any left over, store it in the fridge or freezer to use for another day.
Small kids never sit still! In between mealtimes fuel them up with healthy snacks to give them extra energy. Introducing healthy snacks can sometimes be difficult, but persevere. Gradually try new things to see what works.