Simple Harmonic Motion Set of 4 Coasters
Quirky prints are so much fun! And, when they’re math-related, you know they’re not only fun but smart too. Our Simple Harmonic Motion Coaster would make a smart addition to your table as the perfect base for your various mugs, glasses and cups. No staining of the table surface anymore! Plus, the print on the coaster won’t fade away, even after continual use and frequent washing with water.