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Maker Faire learning mission · Ages 8–16

ROB’s Systems Lab

Repair eight imaginary robot missions—including a four-part USB Power Lab—by reasoning about systems, signals, motion, circuits, and safe control. No login, tracking, or robot connection—everything stays in this browser.

Drive ROB in 3D
Illustration of ROB with symbolic structure, energy, sensing, computing, motion, and feedback pathways.
Concept illustration—not ROB’s wiring diagram or construction plan.
1ObserveWhat evidence is available?
2ModelHow do the parts connect?
3PredictWhat should happen next?
4TestDoes evidence match?
5ReviseWhat would you change?

The engineering learning loop

An adult mentor prepares an unplugged USB cable while a child in safety glasses observes; the red and black power conductors lead toward a protected toy motor while the green and white data conductors are capped.
A typical USB 2.0 cable can expose a 5 V energy path, but a meter—not insulation color—proves conductor identity.

Missions 5–8 · USB Power Lab

Turn an old battery toy into a circuit lesson

Practice the whole reasoning chain before touching a real cable: unplug, let a mentor prepare it, isolate unused wires, verify voltage and polarity, match the load, connect while unpowered, and run one bounded test.

Children do not cut live cables. In the real Maker Faire activity, only a mentor cuts and strips a sacrificial, unplugged USB-A cable. Use an approved current-limited 5 V source and toy, remove its batteries, cover every connection, and stop for heat, odor, noise, or damaged insulation.
Mission1 / 8
Evidence points0

Systems detective

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For families and educators

Ask for a claim, evidence, and a limit

After each answer, ask: “What do you predict?”, “What observation supports that?”, and “When might your model stop working?” The goal is not guessing quickly. It is learning to explain.