Our two are pretty funny about stairs. They have always been able to do one stair, it took them a couple of weeks to learn how to do the three stairs off the front porch. Only one of them will occasionally go up the five stairs in the garage, but not down them, and neither of them will go up or down the longer flights of stairs inside the house that lead to the basement, or outside that go from the deck to the backyard. We think it's great because they can't go bother our houseguests who stay in the basement, and they get to go "outside" on the deck, which they LOVE, but they can't escape the unfenced backyard! We're keeping our fingers crossed that they won't figure out the longer flights of stairs.
