Teacher's Choice Stress Reliever Fidget Poppers easily compress and expand, made of flexible waterproof silicone. Helps relieve stress and promotes improvement in cognitive efficiency. Fidget popping sensation from pressing is similar to bubble wraps, satisfying sensory interaction keeps users engaged and hands busy. Fidget poppers come in various colors and sizes, can be used to decorate your room or workstation. Circle, Heart, Octagon, Square shapes come in Yellow, Red, Blue, Purple colors. Multi-packs available. Lightweight durable silicone material is non-toxic and lasts long, don’t forget to wash or sanitize after regular usage intervals. Material is waterproof and can be used on pool as water hockey pucks. Teachers Choice manufactures a variety of educational products for kids such as teaching clocks, money sets, and coin counters to foster learning and responsibility. We stand behind all of our products and please feel free to contact us with any questions or concerns. We also offer a 1-year warranty on all our products and hassle free returns.