Dhammas

Based on the psychology of nature's contemplation, they help to improve concentration and relaxation for those activities that need it, such as:

Meditation
Yoga
Mindfulness
Taichi
Qigong
Jacobson's progressive relaxation
Self-hypnosis
Zazen
Studying
Sports
Playing an Instrument
Art
Working on a scientific problem
etc...

Instructions for use and more information:

http://dhammas.com/about.html