Last year, when Ben was about 10 months old, I took him to the park and pushed him in the swing. Another boy--a toddler--approached, and his mother lifted him up and put him in the swing next to Benjamin. She asked me how old Ben was, and I told her. I asked her how old her baby was and she told me 22 months. Wait until he starts talking, she told me. It's the best.
Ben's 21 months old now. I'm waiting.