making your own playdough is one of the simplest things you can do with your kids. seriously, it just takes a pot and a few ingredients that you've probably got on hand.
i remember making playdough myself as a kid, loads of time while i worked as a nanny and now with lucy and hudson. this go-round we used the natural food dye that you can find at whole foods--with all colorings coming from plant-based sources. truth be told i wasn't totally ecstatic with the way the colors turned out, and we had to use a lot of dye ($$$) to get bright color. but at least i know it's safer for them in the long run--especially since hudson has a tendency to sneak tastes of the dough despite the high salt content.
anyway, if you haven't done this already, you should do it soon! the homemade variety is much softer than the storebought, and it lasts much longer without getting hard. plus it doesn't smell funky--you can even add a few drops of essential oil to get all the senses working! there are recipes all over the internet, but here is the one that we use. happy playing!!!