[SOC] Morse code oscilator for a young boy

[Thomas McCulloch]

Hi gang.
  I tread  into this group with all the trepidation SOCers deserve.

Anyway I do respect your opinion on things.  I'm looking to teach my 7 year old grandson CW and am looking for an inexpensive Morse code oscillator to give him to get started.  I do have an "entry level" key so that part is taken care of.  Time is something of the essence here (yes, in the SOC tradition I've been putting this off).  Does anyone know of a place to get something cheap and easy that may work for us.  

On a related note if you've had similar experiences I'd love your input.  I'm hoping 7 years old isn't too young.

Thanks
Tom WB2QDG
SOC# 665 (I think)