may i suggest posting descriptions of some of the items or listing the materials u have to work with? even pictures might be nice.
if you are into making some small purchases, i suggest some of the following: neat buttons, rhinestones and glue or those spikey backings, fabric paint (u can get fabric paint in metallic pens, which i find really neat and more mature looking that puffy paints...which are cute too), lace, ribbon, etc. you can even use things around the house like jewellery. i once took a playboy pendant off of a necklace (got sick of wearing it) and sewed the pendant onto the back of a thong...hehe. ooh one of my favourite things to do (i did this recently to jeans) is to go through tattoo galleries online and find a really neat design and then paint it onto the jeans. i used a silver fabric pen to do a dragon on my jeans leg and it looked sexy. i applied rhinestones on the eyes.
hope this was inspirational. i can't wait to check back for your responses and maybe find some new ideas for moi. mahahaha.