My kids had a blast with this Rainbow Play foam we made at home. It’s just shaving cream with a drop or two of food coloring. I got some cool icing food coloring at Michael’s that made an array of bright neon play foam. I put it in a muffin pan. The colors get mixed together pretty quickly by little hands so it might be better to make one whole tray of one color. They can use it in the bath tub, outside in a water tray, in the yard with a hose, etc. I have to get a photo of them playing with it and post it here soon.