UV Color changing X-Large JUMBO Popper! 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 offered in a ultraviolent color changing material that makes this X-Large Jumbo size popper even more fun! Perfect for bubble popping fun for two people at a time. 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!