Even though he is only seven months old, our nanny started stair-training Gideon because our flat is so incredibly dangerous (being sorted soon). We just didn't think he would pick up on it so quickly. I started telling him to do the things he already knew - stand up, step, and then added hand placement on the next step, and he picked it up in just a few tries. Here's where he's at after a couple of weeks of practice. Pretty good for a seven month old, no?