These are Sonic Colors themed rubber band bracelets. "Crazy Bandz, Silly Bandz, Color Band...etc" they're all names for the same thing: stretchy rubberbands with interesting shapes.

You can wear them as bracelets or display them on flat surfaces or in a book like a sticker album. Even if you stretch them, they return to the original shape. Above, you can see the front & back of the pack, & what it looks like when you buy it. The 'bandz' are shaped like Sonic heads & the various wisps from Colors. The colorful & cute wisps make this set a really fun idea! At a low price, they're easy to collect as well. Found in GAME store for 1.99 pound.