I don't know what kind of supplies you have,but here's a few fairly easy suggestions.I'm not going to post links,but I know this is all probably on here.If anything sounds promising,just do a search!
Playing card notebooks(I think these are in Lynn's book). Two playing cards,the middle several sheets of blank paper cut to size,the binding to hold it all together-a strip of colored duct tape.I've seen these done with Yu-gi-oh cards,ect.
CD suncatchers. 2 junk cds,fishing line,glitter glue,or glitter and glue.Glue the 2 cds together,shiny side out,fishing line sandwiched between for a hanger.Do a design with the glitter and glue,or maybe acrylic paint?
Do your own version of the book thong bookmarks they sell at the bookstore for 6 bucks.A piece of thin cord,with a few beads on each end.
And if you really want to rack in the bucks...chocolate chip cookies.Seriously.A nything chocolate.
I love the earring record holders,but I hesitate to suggest it. I made one for my daughter,she loved it.I think they would sell.But it was time consuming to make the holes for earrings. I did the old heat a safety pin/big needle in a candle thing. It's one of those things you probably want to do outside,because of the fumes.
And don't trash any vintage beatles,oaky?