UV Color Changing Keychain Poppers! This fun and engaging fidget just got even better! In addition to helping to develop mine motor skills, improving focus, and reducing stress/anxiety, its now in the fun UV Color changing material and a variety of fun Pocket size shapes with a keychain! Provides multi-sensory feedback with repetitive bubble popping sound, and tactile sensations. One low volume popping side, and one loud popping side for a diverse auditory range. Perfect anxiety reducing tool to help with sleep training, reducing screen time and increasing child engagement. Its bubble popping sound is addicting and will make you want to keep playing over and over. Once you complete one side, turn it over and REPEAT!