A fun craft you can do on your own or with children and friends is to turn seeds into beads. While you can use anything from pumpkin to cantaloupe seeds, many crafters want to make beads from watermelon seeds for their solid black color and convenient size. Used alone or paired with other seeds or beads, watermelon seeds can be used to make one-of-a-kind necklaces, bracelets, or earrings for yourself, to sell, or to give as gifts.
Collect watermelon seeds together as the watermelon is being eaten and put them in a strainer or colander. Rinse the seeds well to remove any remaining the flesh of the melon and wash away any sticky feel.
Place your rinsed seeds in a single layer on a paper plate to allow any excess water and moisture to run off. You don't want them to dry out or they may become brittle, but a dripping wet seed can be hard to handle.
Thread your needle and tie a knot in one end of your thread. The length of your thread will be determined by what you want to make.
Push your needle into the body of a seed where you would like to pierce it. Use a thimble to protect the finger pushing on the needle and send the needle all the way through the seed and pull the seed to the knotted end of your thread.
String as many seeds as you wish to achieve your desired look. Any unused seeds can be discarded or you can go ahead and poke holes through them and allow them to dry completely for a few days before storing them for future use in a paper bag.