I built a few crackleboxes (kraakdoos) a couple of years ago and they were quite fun but a bit wierd. I'd got the circuit off this site but its recently been updated with some changes to the circuit and this really works a lot better now. DIY one yourself - check ebay for the elusive 709 opamp (search for LM709*).The Butterfly is routed & tinned - the wings & antennae are touchpoints & all the circuit lives in the body. A little N 12v battery provides the power. The other one was built quickly like a Postcard Weevil to test out the new circuit changes and proved to workout really well.
[I'm not doing these for sale, by the way]
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