Tranquillity Park is located next to Houston's City Hall. We've been here several times and it's not much of a "play" park... but when I read that the park was designed to represent the cratered lunar surface... I decided we needed to visit it again.
This park suddenly got a whole lot cooler when I learned it was built to commemorate the Apollo 11 moon landing in July 1969. Apparently the first words transmitted by Neil Armstrong from the moon, "Houston, Tranquillity Base here. The Eagle has landed."!
So swing by this moon park the next time you are in Downtown Houston. I'm sure your little kids with big imaginations will believe you've landed on the moon (even if you can't see it!).