Play is how we learn best, or at least the way we learn best that is the most fun and engaging. When practice gets boring, you have nobody to blame but yourself. If you’re tired of playing scales, try them upside down, underwater, or even something as simple as playing with the lights off, or playing barefoot. Play as practice is just one of the many simple but powerful techniques found in The Practice of Practice and Practice Like This.
Most mammals use play and playfulness in practice, including the great trumpeter, educator, and composer, Allen Vizzutti (discography/bibliography) in this clip: