If you love to craft, those cheap, empty plastic ball ornaments you see everywhere this time of year are pretty much the best thing to happen to Christmas trees since the invention of string lights — and what these moms did with theirs is guaranteed to inspire if you're a new parent (or grandparent).Parents are using the empty baubles to store and display their baby's hospital gear (think adorable knit hats, hospital bands and photos). And the results are enough to make any new mom or dad's heart melt.Blogger Jessi from Practically Functional used her child's knit hat and ID bracelet to fill hers, and shared her tutorial on Craftaholics Anonymous. Blogger Priscilla Coker of Thrifty Crafty Girl crafted something similar but featured a beaded bracelet with her child's name front and center.You can take it a step further by adding your child's name to the ornament's exterior with a decal or peel-and-stick letters. You can also enhance it with festive ribbon, a photo or sonogram of your little one, or even a teeny handprint stamped on the exterior. The best part? These keepsake ornaments take almost no time to craft and cost just a few dollars to make. Assemble one this year, and continue the tradition as your youngster reaches new milestones, and you'll have a tree filled with precious memories in no time!