You can spend 20 minutes a day doing any one particular activity, and you will get better at it. If you did yoga for 20 minutes a day, your strength, flexibility, and balance would improve. If you ran for 20 minutes a day, your cardiovascular function and physical stamina would improve. If you meditated for 20 minutes a day, your level of insight and your outlook would probably improve.
What if you played kalimba for 20 minutes a day, every day?
I myself sometimes have difficulty finding the time to play kalimba every day, but when I do play every day, my life is better. I am challenging myself, and I am challenging you: can we play kalimba for 20 minutes each day?