Cute, but a bit out of date.
On a newer android phone with the right virtual keyboard, you can just slide the tip of your index finger from letter to letter, and it guesses what you want to type.
Some keyboards are better than others… I like “Swype”….You can download several to try.
It’s much faster than tapping out letters…and instead of those mini thumbs, large or clumsy fingers can just use a stylus.
I even have knit gloves with special fingertips that will work touch screens … and they came from the dollar store.