Escape from the crib

Henry has learned how to climb out of his crib.
This has little impact on us at night or in the morning. He goes down for the night just fine, and doesn't get out of bed until he wakes up for the morning.
But naptime - the time that used to be the hour or sometimes 3 hours that I could count on for some quieter time - doesn't exist right now. Yesterday I scooped him and and put him in his bed approximately 482 times. It lasted 90 minutes. As a last resort, I spanked him (I am not a spanker, and was affirmed in this belief when after I spanked, he looked at me and hit me back. I had it coming). I tried snuggling, I tried firmness, I tried ignoring. There was some yelling....
Finally, he spent some quite time in mom and dad's bed watching Bear in the Big Blue house.
In the meantime, Willa was waiting for some quality mom time. I promised her I would play princesses with her after Henry was asleep. We never played.
Today we were on track for a repeat when I chose to not let it get to me. Instead, after 20 minutes, I closed his door and put both of our baby gates up on his door, one stacked on top of the other. I had essentially created a non-opening screen door for him. And then I went to do dishes.
After he played on the floor for about 10 minutes, I heard him open his door. He yelled, "NOOOOOOOOO!"
I stood at the sink giggling. Victory(ish).
He stayed in his room quietly, and I got some chores done.
I'm hoping the excitement of his new trick wears off soon, and he's back to his nap.