We also went to the Denver Nature and Science Museum. Since we had a pass to Discovery Gateway from when we lived in Utah we get in free here - but it is pretty far through some bad traffic - so this is only our second time. It is not for young children like Discovery Gateway is - but my kids have liked it well enough both times. They do have a "Discovery Zone" for hands on learning but its not very big - but they have really cool exhibits that my kids have enjoyed - especially a really cool one about gems and precious minerals and Egyptians mummies.
They do have a tiny little astronaut section for kids under 3. Both the girls wanted to dress up.
By the time we hit the discovery zone it was about nap time. Madison was VERY ready for lunch and naps.
You can dig for dinosaur bones.
I can always count on Megan to find the puzzle.
Noah built and kicked down towers.
And played with the magnet wall.
Brock, for the first time, seemed to be too "big" for most of the stuff. He was kind of bored and wandered from one activity to the next. I always thought I would be sad when they were in school all day and missed our activities - but truth is - he is too old for most of the stuff we do. It is the natural progression of life I guess.