I looked up this Silly Bandz toy on Wikipedia, it says
“The toys are sold in packs of 24 for about $4.95”
This does not sound unreasonable for a toy. Perhaps it can be used to teach responsibility, such as only giving one (out of the 24) out every two/three weeks and telling the child they have to take care of it (not lose or break it), or they will have none. Or giving one out for doing extra, and let the child think how she could help, and if she does so without asking, reward the child.
Everything can be a teaching moment, even something silly (intended:).