The tiles are from Jamie's grandmothers Mah Jongg set. They are still used when playing Mah Jongg weekly.  

The red splash in the background of the logo is an homage to the nail polished tiles use for Jokers in American Mah Jongg before the sets came with Jokers. 

Mah Jongg Mammas was named because of the generations of our mothers and us that have passed down the game from generation to generation.