between 100-200, after long chat with the kids the plan now is to have diff kinds of patterns and triggers etc like incorporating a light sensitive resistor and ntc, maybe have a selector switch to swap in and out diff circuits for diff effects.
like i say its only real purpose is a fun way for us to learn a few things. i am open to suggestions on what kind of circuits and effects to use for it, with one proviso....at this stage we want to keep away from pic's and that kind of thing............unless