These potty training stickers reveal cartoon pattern when exposed to urine, adding much fun to kid toileting with these. Durable and stable material, not easy to deform or fade, it can keep the delicate shape well, practical and waterproof. Features -Color:As Shown-Material:PVC-Size:7.00X7.00X0.10cm/2.75X2.75X0.04in-Note:heat discoloration design-You will receive enough quantity toilet training stickers, which can be used for a long time. -The potty training stickers are crafted from durable material for reusable and easy to clean. -The training stickers work in toddler potty training, motivate her/him to sit on toilet seat on time and do potty properly. -These toilet seats stickers are heat sensitive and reveals color upon contacts with heat, reveal cartoon pattern. -When the toilet training sticker encounters a temperature lower than room temperature, the sticker will turn black. Packing list: 10 x sheets of stickers