We are in the beginning stages of potty training, these are great for little leaks, but our son is definitely not happy when he full on goes in these, which is good. They also do a good job of holding in solid waste, if your kid is as stubborn as ours and goes to the bathroom immediately AFTER you take him off the potty. He really likes the cars too, and isn't very verbal yet so we are trying "Don't pee or poop on the cars" instead of "Don't pee or poop in your underwear" which is a pretty complicated phrase to comprehend when your vocabulary consists of kitty, mom, dad and poop.