"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Welcome to Ask Dr. Harvey Karp, our new fatherhood advice column at Esquire, where the author of The ...

Your toddler has no problem peeing in the potty. But when it comes to number two, that’s a whole different story. Your child might just sit and sit with no result. Then, as soon as the Pull-Up or ...