A 5-year-old boy comes to occupational therapy on a referral from his school. He takes the stairs one at a time with a hand on the rail, he has stopped going near the climbing frame, and at story time he needs a long moment and someone to pull on before he is up off the floor. His parents are clear that none of this was true before: he walked at the usual age and, as a toddler, ran and climbed like everyone else.