Sumo Wrestlers?

This morning when I went downstairs to tell the boys they could get up, I found them both on Seth's bed playing. Although this is pretty typical, I was startled to see that it looked as though they had both put on about 10 pounds overnight! They soon showed me that they had already got out their underwear and socks for the day and shoved those into their pajamas... along with several stuffed animals as well. What will they come up with next?
p.s. Currently, Seth had a very scary fake smile... we're doing our best to get him to smile nicely, but I think we still have a long ways to go!