Handmade Drum Practice Pad from 100 Yen-Shop Items

The required components are:

Two cork pot coasters

Four silicone pot coasters (3x red, 1x gray)

A thin layer of black sponge for additional "bounciness"

Glue

It was a quick and easy build that came together nicely, and now I have a reasonably-priced and conveniently sized drum practice pad.