No Nasties water beads are non-toxic, easy to use and encourage children to learn through sensory play, using hand-eye coordination - they are "slippery little suckers!" They are teeny tiny little beads, about the size of a poppy seed before they are soaked in water after which they grow approximately 150 times their original size. What's Included 10g of water beads (approximately 500 beads) Packaged in a recyclable soft plastic bag and a recyclable cardboard box How to Use To grow them, you simply put them into a large bowl, cover with 5 cups of water and watch them expand over the next 5 or so hours. PRO-TIP - Use warm/hot tap water for faster growth. Once they have grown, drain away excess water and voila, you have a bowl of colourful, bouncy, ball fun! Littlies (not for use under 3 years)