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The Big Idea

Electricity flows only through a complete circuit.

Ages
4+Adult supervision recommended.
  • Circuitry
  • Observation
  • Prediction and Testing
  • Collaboration

Safety

  • Batteries are sealed inside the acrylic body and cannot be accessed or removed.
  • Contains small parts. Not suitable for children under 4. Adult supervision recommended.
The Circuit Stick: a clear acrylic tube printed TOUCH BOTH ENDS TO MAKE A HUMAN CIRCUIT, with a metal contact at each end marked plus and minus

What’s in the Kit

  • One Circuit Stick, ready to use
  • Built-in batteries, sealed inside for safety
  • Full-color instructions

What you add

  • Nothing. The Circuit Stick is ready to use the moment it comes out of the package.

Real-world connection

Why a Human Circuit?

Every time a light turns on, electricity is flowing through a complete circuit, a closed path that connects a power source to the device it powers. Linemen and power workers keep those paths connected across entire neighborhoods so the lights stay on. When a line breaks, the circuit opens and the power stops.

The Circuit Stick works the same way, with people as the path. Touch both ends and the circuit closes. Let go, and it opens just like a switch. Add more hands to the chain, and every person becomes part of the circuit.

A high-voltage substation at golden hour, its transformer and insulator strings in the foreground and the long windowless halls of a data center behind

For classrooms

One Circuit Stick connects a whole group, because every student who joins hands becomes part of the circuit. Start with one student holding both ends, then add a partner, then the whole class. Class Packs let several groups test at once. Every stick arrives individually packaged with an instructional card, ready to use the moment it comes out of the package, and supports NGSS content on how electric currents transfer energy.

Purchasing for your school or program? Request a quote.

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