This is a simple project that uses 11/0 beads in the ladder stitch on a thin wire (I cannot remember what gauge this is).
I've made these with my nephews a time or two, but not for a year or so now. My oldest niece just turned 4 years old, and I think it's something she'd enjoy doing. Maybe the next time I'm over for a visit, I'll take my bead stash and see if she wants to make rings.
I'm very much looking forward to the day that I can show my own little girl how to make these.