Set of 5 heat reactive toilet targets

Lot of 5 self-adhesive tablets waterproof to paste in potty or in the toilet.
The watermelon remains black until the heat of the urine erases the black and reveals an image.
Then when you rinse it potty or we're pulling the black one back.
This small system can help children who don't want to go on the potty, but also children and adults who pee standing in the toilet.