"Laundry" & Matching Socks

Grandma Kathy has been teaching Westley about pairs. He's pretty much got the concept down and enjoys pointing out pairs of things, so I thought he would enjoy this.
I raided all our drawers for colored or patterned socks. we counted that we had 7 pairs (and that meant 14 socks).
Then I used a cardboard box that Westley and I turned into a washer/dryer.
I made a big deal about how the socks were stinky and dirty (which he found to be hilarious). Then we put them in the laundry machine to wash and dry them. This was Westley's favorite part.
Then, when they were clean and dry, he pulled them out and matched them up.
Westley kept insisting they were dirty again, so repeated this all a few times.

Will was having more fun playing with blocks next to us, but he did like tapping on the top of our washer/dryer (which Westley didn't like) and took his turn putting some socks in the washer.