Help children calm down, focus, and relax in the classroom, at home, or on the go. Stackable design is filled with unique sensory materials. Orange Tube: Colour Mix liquid with red and yellow liquids. Green Tube: Glittering Gems mix with rainbow coloured gems and star glitter. Blue Tube: Serene Swirl with blue swirl liquid. Purple Tube: Soothing Sand and glitter mix of reverse sand and star sequins. Designed with key chain attachments to easily connect to a backpack or key ring. Ages 3+. 4 per package.