When I first learned how to use a laser cutter, I went through a phase where I made a lot of coasters. I had fun experimenting with layering and paint to create different shapes. Below are some of the coasters I made.
I call these "Boardwalk Coasters." They have two layers-- one circle piece that I painted white and then 5 multi-colored planks on top.
These coasters are similar to the Boardwalk Coasters. I edited the planks to be wavy and I painted them all one color.
The monstera leaf coasters on the left have engravings for the stem which I painted black. The candy heart coasters are a single layer that I painted and then layered Cricut-cut vinyl on top of.