Color changing SPACE toilet target stickers which change color when the wee hits the sticker. An intergalactic fun way to make toilet training and potty training fun. Learning to use the toilet is a big step for any child. Learning to aim straight is an ever bigger one. Stick and aim have a simple yet effective solution to make sure bathrooms are kept clean and toilet training is fun. Also utilized in schools and childcare centers, proven to be very effective. PLEASE NOTE: Room temperature must be below 90°F / 32°C for the color change to be effective. The color change effect is most effective within the first 6 weeks. Upon removal, do not flush the stickers. Please dispose responsibly.