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Squishy Circuits
Just think of the permutations of launch controllers you can come up with using play dough ! With very little external circuitry ( relay and/ or SCR ) this can make for a fun kids launch...smash together 2 blobs of play dough and WOOSH ! You could go crazy here too and hook up an Arduino board ( www.arduino.cc ) to control multiple launch pads. R/C applications could be "fun" as well !
TED Talks - AnnMarie Thomas: Hands-on Science: http://www.ted.com/talks/annmarie_t...y_circuits.html
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