Science and Technology Hello our 'Little Scientists', today we will make some Rainbow Gloup. You will need: 1. A container such as a bowl or deep plastic tray. 2. Cornflour (corn starch). 3. Food colouring (any) 4. Water. It can get messy but is a LOT of FUN! Talk about the different properties you can see. e.g. It looks like a liquid but can feel solid. It can pour and drip from fingers etc.