Perler, Hama and other varieties of fused bead crafts make an ideal choice for creating your own fun and novelty pieces of custom jewelry up very quickly from scratch. The bonus is that you get to design whatever you want with these and then transform them into wearable jewelry that you can enjoy. Small dangle earrings make for a fast crafty project that you can make up.
If you've worked with fused beads before, you'll know that you need to bond the plastic pieces together by heating them up with an iron so that the beads stick firmly to each other and create a strong bond. Smaller designs and motifs normally work best for jewelry and I made some here using a small skull pattern. You could try little shapes like hearts, flowers or fun items like fruit.