My kids love Boomwhackers and I must admit that on stressful days they are quite...therapeutic for me too!  Thanks to Music K-8 for providing the Boomwhacker letters as a free download.  Basically this is a large timeline of Boomwhacker history.  Take selected tidbits from the history section at www.boomwhackers.com to create the information listed and print the lettering from Music K-8's Boomwhacker Central.