Deletion of Boomwhacker

Comment: Google Books has lots of hits ( states that you should search Google Books before AfDing). Some are for books published by the corporation who sells boomwhackers but plenty aren't. Steve Greenberg's book in particular has lots of info on the history of the product. I added 3 books as refs; there's more
Stance: keep
Cited policy: Wikipedia:Articles for deletion (WP:BEFORE)