If you're pulling your hair out trying to find ornaments that work for kids, check out Gifts for Christmas that's pretty much a one-stop shop for ornaments for kids and all sorts of unique niche ornament Christmas gifts.
They have teen ornaments, as well as ornaments for kids all the way down to toddlers.
You will not find kids ornaments below toddler, but you can find Sesame Street ornaments for kids between around 2 years old up through 10ish. Then, they also have kids Christmas ornaments for the tween set like musical instruments ornaments, sports ornaments and others age appropriate for kids activities.
Lastly, there are teen ornaments like pink purses, cool girl stuff, lipsticks, and all sorts of random teen girl ornaments.