You will need clear plastic ball ornaments which are available in Michaels and other craft stores. I was using ornaments about 2-1/2” in diameter.
Crochet a small swatch with your favorite yarn, I don’t recommend using bulky yarn. Or, crochet any small size shape or appliqué that you like. For the swatch use a crochet stitch of your choice. My first ornament used a crochet swatch I made with Star Stitch and medium weight worsted yarn. The size of the swatch is about 2” x 1/5”. For the second ornament I made a tiny snowflake with size 10 crochet cotton thread. When you make your crochet piece, don’t finish it off – leave the last stitch unfinished. Also leave a long tail to make a tiny ball of yarn. When making a ball, make sure that it will go through opening of the ball ornament. When your yarn ball is done, use small drop of hot glue on yarn ball to secure the yarn. Otherwise the ball will unravel.
Then you will need to make a short crochet hook to put inside of the ornament. The length of the hook should be slightly shorter than diameter of your ornament (about 1/8-1/4” shorter). Use an aluminum hook of small size (I’ve used hook size 2.25 mm). Also you will need a wire clipper and eye protection. With wire clipper clip the hook to the desired length. I asked my husband to do that for me. Also he filed the clipped end of the hook as it was very sharp.
Insert your hook into the last unfinished stitch of your crochet swatch and put them inside of the ornament. Add sequins, sparkles, beads, piece of Christmas tree or anything that your creative mind may want you to use. Arrange the hook and crochet piece inside of the ornament with a straight knitting needle or just shake it and see how it arranges by itself!
Attach hanging string and hang your ornament on the Christmas tree or give it to a friend who loves to crochet!