My 20 month old LOVES to run around naked. I took pictures of her on the big wheel bike that has a noise button that sounds like a real motorcycle. What a hilarious picture. I sent it to my best friend, but told her, you have to be careful these days with naked little kids, everyone over-reacts, so don't show it to anyone else.
I have pictures of my son bathing. He loved being in about an inch of water in the tub and he would flail his arms and legs. Biggest smile on his face. Also have pictures of him climbing into the kitchen sink to "help" with dishes.