Get some great deals at Amazon on products for decorating your nails. These include FREE SHIPPING (no minimum required). (Note- Amazon prices are subject to change unexpectedly. Check the price before you click to buy).
Get 3000 Nail Art Gems in assorted colors for only $1.53. These could also be used in crafting.
You can also get Nail Tattoo Stickers in a big variety of designs for only $2.49 a package. These have up to 56 tattoos per pack.