craftgrrl | pop-up cards and pop-up book ideas

I’m working on some pop-up cards and pop-up books and I have searched everywhere online for ideas. I’ve never really been into scrap booking but have seen some pretty neat techniques used in scrap bookings that are pop-up like. Dose anyone know of any cool sites or know of any thing that might give me some more ideas.
I’m looking for things that are interactive, like you have to pull something out or move something on the page, things that spin etc. I’m not sure how to explain it. Anything would be lovely! Thank you so much.