During our vacation Thomas learned how to count to ten. We walked up three sets of stairs to and from our apartment, so we counted each stair out loud. Joanna helped count too. Thomas said "YAY" as we got to the top or bottom of each set of stairs. Thomas joined in and now he can count, with some prompting, to ten, sometimes even through eleven and twelve, but there is usually a big "YAY" to stop the counting.