Most mammals use play and playfulness in practice, including the musician in this amazing video, the great trumpeter, educator, and composer, Allen Vizzutti (discography/bibliography):
Ever since I picked up the trumpet, practice has been a never-ending search for privacy. Mostly a failed search, too. When I was a kid learning to play, my parents banished me to the garage, and this was a great thing, even though the garage was unheated and we lived in Alaska. It gave me a space to explore without fear of annoying the hell out of anyone within earshot. It also let me escape fear of judgment and gave me the freedom to really explore the instrument and my relationship with it. Now I live in Chicago. No garage. Not even a house. I’m in an apartment and have neighbors on five sides.