If each of the hosts would please post on here what, if anything, beyond basic supplies is needed for your challenge, it would be helpful. Please post today or tomorrow, so we have time to shop.
Basic supplies:
card stock
patterned paper
adhesive
scissors/paper cutter
3D adhesive is usually helpful
stamps and ink are usually helpful, as well
some way to add color: pencils, markers, crayons, ink, etc.
a way to add sparkle is usually helpful: glitter, glitter glue, Stardust pens, sequins, rhinestones, etc.
An imagination is necessary, but I know we all have active imaginations, so that's a given.