US Patent 7204655 Sound producing crayon

A hand-held sound-emitting writing instrument comprising a writing portion and a sound-producing portion for attachment to the writing portion. The writing portion comprising a marking end for marking a surface and a first connector located opposite the marking end, the first connector comprising an identifying termination. The sound-producing portion comprising a second connector releasably connectable to the first connector and a sound-producing unit for playing a sound recording associated with the writing portion. Wherein the connection of the first and second connectors enables the sound-producing unit to communicate with the identifying termination.