Arm Wrestling

My son has been asking me to wrestle with him lately. To try something different, I asked him if he wanted to arm wrestle me. I thought he would know what I meant, but he gave me a puzzled look. I had to take his right hand and position it against my right hand before he finally understood. I guess he never arm wrestled at pre-school, which I suppose is a good thing because he should be following the teacher's instructions and not goofing off instead. But eventually, every kid learns to arm wrestle at some point, I think. I did when I grew up. As long as the arm wrestling is for fun and doesn't get too competitive, it can be another thing that kids do.