I want to do it this time!!!! My kids would LOVE to do it if you have enough for a kid's exchange. My girls are 7(8 in July) and 9(10 in June). I would say for kids, about the same price range $5 or $10 and I think any age range would be ok. I don't know if you want to pair up like ages or does it matter? To me, I think my kids would love to shop for any one, any age, boy or girl. They seriously wouldn't care, it would just be fun to pick out things for a secret buddy. I think the parents(or kids, if they're old enough) could do just like we do, post their likes and dislikes, favorite things.
Anyway, I'll PM you my address and let me know about the kids exchange!
Thanks for doing this.