Shaving Cream Bathtub Paint - kids love it and it cleans the tub! and so easy to make. Oh I'm gonna do this.Shaving Cream Bathtub Paint - Use a muffin tin with shaving cream squirted into each cup & mixed with different colors of food coloring.
How to keep a child busy for hours in the summer: DIY: Giant Ice Cube Awesomeness - filled with plastic animals, dinos, and such. And I'm sure you could put in food dye before its frozen to color it like the ice block in the photo.
Rainbow Bubble Snakes - Need: Half a waterbottle, rubberband, bubbles (dishsoap/water), food coloring, sock. Steps: Dip sock held by a rubber band on the water bottle in food coloring in dish soap and food coloring and blow. Have fun!
portable roads that are easy for kids to put together and will travel easily, made out of old denim and yellow paint. velcro helps them stick to carpet - awesome idea! I'm so doing this with a pair of my old jeans!