Don't show disrespect for those who buy expensive instruments they can't play and stick them under the bed! They are the thoughtful ones who have children who find it after Daddy's handed in his dinner pail and give it to Oxfam. This keeps down the cost of instruments for the rest of us.
I see several comments about the kazoo, but no-one has even mentioned the Swanee Whistle (as played on at least one of Mr Armstrong's records) without which the former cannot be played seriously. The good Samantha will attest to this.