Boo! Books are filled with coupons for five free Jr. Frosty treats, and a sixth coupon to redeem a $1.99 Wendy's kids' meal with any purchase. For each $1 Boo! Books coupon book sold in a Boo! Bag or individually, Wendy's will donate $0.90 to The Dave Thomas Foundation for Adoption.

Wendy's began offering Boo! Bags on Oct. 21, nationwide.