_:nfc7c648d4803444fa66d50700b102fa5xb17
<http://schema.org/reviewBody>
"This is one of my favorite &quot;props&quot; for demonstrating circuits.  Students can really figure out a lot on their own by just playing with the device.  When they hold hands with one or more other students and they put this in the chain, they get lights and sounds and an immediate reaction that validates when they have a complete circuit and when they don&#039;t.  We try to put other objects in the circuit (a wooden ruler -- no reaction; a copper wire -- lights and sound!)  I love products like this that allow students to figure things out on their own!"
<https://www.teachersource.com/product/energy-tube/>