Mr B. finally has a telescope and as we live in the country light pollution is minimal. We have a huge covered balcony so star-gazing has become one of our favourite family activities.
I'm seriously behind with my Christmas shopping, but I'm confident that I'll find what I want at Nature et Decouvertes, a wonderful French shop selling original, educational toys and books for kids, amongst other things (I think Miles would quite like to dress up as an astronaut).
If you live in the US (a bit late for shipping elsewhere) there are some really nice vintage science books for children on etsy. I love these school books from the 50's and 60's and am gradually building up quite a nice collection of them at home. If you don't mind a few library stickers and cards, the illustrations in these books are fabulous!