For those of you whose kids brush their teeth perfectly, congratulations!  For the rest of us, there’s Listerine Smart Rinse 
.  Right now you can print a coupon to save $1.00.  Save it for a sale or take it to Walmart for this deal:

Listerine Smart Rinse $4.47, Regular Price
Use $1.00/1 – Listerine Smart Rinse Anticavity Mouthwash, Listerine Agent Cool Blue Tinting Pre-Brush Rinse or Reach Kids’ Toothbrush Product – (bricks.coupons.com)
Final Price: $3.47