Toddlers and transitions go together like peanut butter and ketchup—as in, they don’t. Take my toddler being picked up from preschool for instance. He’ll typically run out of the door and headbutt me, not because he isn’t happy to see me, the director explained, but because transitions are hard (or at least I’m choosing to believe this!). Other challenges for toddlers include sharing and having any respect for boundaries whatsoever. Because mommy likes to go to the bathroom by herself—or maybe just not while your head is between my knees, honey.