FREE at Walmart – Kids Toothbrushes This post may contain affiliate links. Please see the full disclosure policy here. Posted on May 5, 2014 Written by Mary 1 Comment FREE Kids Toothbrushes at Walmart Walmart Scenario: Firefly 2 count toothbrushes $1 – $1/1 Firefly Dental Product from SS 5/4 Final Cost: FREE!! You can also check the DOLLAR TREE for $1 toothbrushes as well! thanks anabelle!