[sdiy] Electronics class for kids

[Monse Lozano]

This is my first post to the email list, hopefully it goes through


I am about to start an after school programs to teach 6th-8th graders basic electronics and I would like to incorporate some audio synth type circuits into the class.  I was wondering if anyone could give me any suggestions for cool noise making projects?  I'm not very familiar with synthesizer design, I've been reading up on it a bit and started putting together a simple sawtooth generator, the one with an integrator and a comparator, where the output ramps up until the comparator shorts the integrator's cap and discharges it.  I'm looking for simple circuits like this, I'm not worried about correcting non-linearities or temperature compensation, just noise makers to get the kids interested.  

much thanks!