Package Content: You will receive 25pcs potty training seat magic sticker. Size: about 2.76 inch(70mm) in diameter, 0.01 inch(0.3mm) thick. Potty Training Sticker: Our car potty training stickers are black, magically show photos when exposed to urine, and change back to their original black when exposed to cold water. This potty training sticker is very interesting for children to urinate and helps them learn to use the potty quickly. PVC Color Changing Sticker: Our potty targets stickers are made of quality pvc material and thermochromic paper, strong adhesion, reusable and long-lasting. They are sensitive to heat, and the fun patterns will appear when exposed to heat. Easy to Use: Directly remove the backing adhesives, stick the potty training stickers on the bottom of potty. The stickers can be reused for many times, just rinse them with cold water and they are ready to use again, paste and remove multiple times without leaving a trace. Wide Application: Our potty training stickers are a perfect present for your children or friends who have kids. They are suitable for both boys and girls and can be widely used on various surfaces.