You should have a look at Circuit Scribe
<a href="http:&#x2F;&#x2F;www.circuitscribe.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.circuitscribe.com&#x2F;</a><p>It&#x27;s basically pens filled with some kind of metallic ink that conducts electricity. It comes with &quot;blocks&quot; you place on a paper sheet. You use the pens to connect the blocks.