At first it sounded like a punishment.
But you realize, that not being allowed to wear clothes, means that you won't get in trouble for running around naked.
Besides, you've been reduced to a toddler, so at this point you didn't have anything worth hiding.
Making the best of a worst situation, you decide just to have fun running around the zoo completely naked! You naturally get more than a few stares, but no one questions you about it. Rather word got around about your punishment or no one wanted to get involved, who knows?
The breeze on your skin when you run, or do the fastest paced toddle you can do at your age, is pleasant, the sun is warming. And after a few hours you can't even remember why you ever wore clothes in the first place.
You become rather glad for your punishment, and make a note to never wear clothes again if you can even after leaving the zoo.
The day passes quickly due to having so much fun, and soon day turns to dusk.