One thing to ruler them all.
Only $1.95 for this metal whacking stick. Has inches on one side and metric on the other. Great for beating math into student's heads.
"Camping is In-Tents" Canteen with Carabiner
"Catch of the Day" Crappie Fish Fridge Magnet
"German" Sun und Dust Goggles
"I'm Appreciated" Pin