There are now pull ups that get wet from inside. They are sold in Walmart. In the package reads "Cool Alert". I found them when I was about to start potty training my son and after my recommendation a dcg that is currently being potty trained is using them. Parents here need to start the potty training first and I support their efforts. I tell them when I think kids are ready to start training at home, how it is going to work here and also ask them to read again my potty training policy posted in my webpage.