Yes! Here are instructions for cleaning the game pieces included in Math Wizard and the Secrets of the Dragons:
If you accidentally spill liquids or water on the food pieces, towel dry them carefully, thoroughly and quickly to ensure no damage occurs. Pay special attention to the edges of the food tiles, which are more vulnerable to water damage.
Note that any kind of dry erase, wet erase, or other markers will permanently stain and ruin the food tiles.
The rulers can be cleaned with a damp or dry cloth. Please avoid using any cleaning solvents as this may remove paint from the surface of the ruler.