I'm so glad you did! Thomas has discovered the joys of Peek-a-boo. And oh, it is fun. :) He also loves to be held upside down - he grins and giggles and thoroughly enjoys himself.
He does NOT like tummy time. When he was younger he didn't seem to mind it, but now that he can sit up and play with toys, he's pretty mad when I put him on his stomach. Mom, I can't sit up this way! Mom, I can't reach my toys!! Well, son, learn to crawl and then you can! ;)