Makes twenty bowls! Melty Crystals are a fun and safe way to explore science and the properties of plastic. You can also make suncatchers, drink coasters or jewellery. Arrange the crystals on silverfoil, place in oven and watch the crystals melt and join together. Melty Crystals are food safe (you can eat off them) non-toxic and made in Australia under carefully controlled conditions. Includes 10 metal trays, ten straws, instructions and template. To be used under strict supervision.