Kids are going to get a kick out of these, in fact, I wonder if they’ll actually let these be used as coasters. If used as originally planned, these are fun coasters. This math set consists of 5 coasters, representing the addition, subtraction, multiplication, division and equal sign.

Assuming you can pry these out of the hands of your kids, these novelty coasters will show your mathematical prowess.

[Math Coasters via Geek Sugar]