I have to teach 8-10 year olds about Space! Any ideas?

My school is organizing a week long holiday camp for the poorer kids in the neighborhood. There's load of fun lessons (no real-hard thinking involved) and classes where the kids can move in and out from depending on their choice (they'll get an program choice list). It's something like a kid symposium *** conference.

The class I've been assigned to is 'Space'. I have to hold class for 5 days at 1 hour each go. I have to do a different space topic everyday, since the same students may be coming back everyday! Since I normally teach PE this is rather new to me (the Science teacher's on maternity!).

Can I get a few ideas about:

1) What topics on Space kids will be interested in?

2) What kind of games should I include?

3) I may or may not get a projector and computer. If I do what should I play on it for the kids?

4) Any other ideas?

Bear in mind they're 8-10 year olds and the lower percentile in terms of smart level, so I suppose any ideas on how 'deep' into space would be very useful!

Thanks so much!