Coupons.com has a $1.00/1 Hello Kitty FireFly Toothbrush coupon. Print it off and take it with you to Dollar Tree to pick up a FREE toothbrush.
Hello Kitty Firefly Toothbrush – $1.00
Use the $1.00/1 FireFly coupon here
Final price: FREE!
Note: Look for the FireFly logo displayed on the back of the toothbrush packaging. Please also note that Dollar Tree prices may vary.