Temperature Sensitive Change: This Slime is temperature sensitive and can change colour, it is orange when it is cold and will change to yellow when it feels the temperature (put your palm on it). Wide UsageExperience the fun of mixing and changing colors.perfect for preschool props,display samples, teaching aids, pressure relief toys and more. Safe & Non-Toxic: Crafted from non-toxic materials, this putty kit has obtained a number of international safety certificates such as CPC, ASTM D4236, CE and EN71. It's free from harmful substances, offers a safe and smells good fidget play experience for kids and adults. Suitable for kids aged 3+. Reusable: This 1.4 oz. slime comes in a resealable container for easy making it easy to carry and store. After playtime, simply put the slime back in its container, tighten the lid and place it horizontally to keep it fresh and ready for the next adventure. Soft Crunchy clay slime, best for birthday gifts, prizes, party favors,Easte basket filling suffers, Christmas stocking stuffers.