What are some alternatives?
When comparing Touch Pianist and Type Drummer, you can also consider the following products
Simply Piano - Fast and fun way to learn piano
Keezy Drummer - Make a beat in seconds
Pianu - Learn to play the piano in your browser.
Splice Beat Maker - Make and share beats in your browser
lightnote - An interactive site to learn the basics of music theory 🎶
Sampulator - Make (and record) beats on your keyboard