DD (2.5) has recently shown a huge interest in our solar system. She regularly makes her toys "go to the moon" and explore space, and wants to look at the stars through a paper towel roll, every night.

We've been borrowing space related books from our library, but I'd like to get her a toy or two.

Can anyone recommend an awesome toy, activity or craft that's gotten a lot of use by your little astronaut?

Thanks!