Amazon offers some deals on items as add-ons for orders $25 or more. Here are a few of the hotter ones today:
Play-Doh: Case of Colors for $4.99.
Crayola Color Wonder 10 Mini Markers for $1.48.
PB2 Powdered Peanut Butter (With Chocolate) 6.5 oz for $4.31. May be able to use these to make some good smoothies!
Keep in mind that prices flip fast on Amazon so be sure to verify the current price before purchasing!