I have made few, not many. The parts for pierced ears or earring clips are available at craft stores like Michaels. Straight-eye hooks will hang best of course. You will have the opportunity to make the colour and size that fits your offspring re. hair colour/design and neck length. I always tied Carrie Stevens style streamers because non-fishers recognize them as flies/lures and they can be colourful or dramatic.
The main challenge is deciding if you are going to cut off the bend of the hook, or if you are going to leave the bend and point, gluing a small bead onto the point (maybe cut 1/2 the point off so it looks like a hook with a bead on the point). Good luck regardless.