Circuit Workshop

Complete the path. Light the bulb. · Grades 4–6

Explore without a score

Practice board

Explore the workshop

Tap a connection or switch, then test. Look for a complete path from one battery terminal to the other through a bulb.

Worked example: light bulb A.Close the open switch, then press Test circuit.

Not tested yet — edit the board, then test.

— = connected · · · = gap · / = open switch · Dashed blue trace = a complete tested path. Tab moves; Enter or Space operates buttons.

What this model shows

Wires connect parts; switches open or close a path. Bulbs in series share one path. Parallel branches offer separate paths, but both still need their shared connection to the battery.

These are ideal batteries and bulbs. We model whether a complete path exists, not brightness, voltage, resistance, or battery depletion. Connection positions are fixed, so you cannot bypass a bulb or short the battery.

Original game and diagrams · MIT License · No ads, accounts, cookies, or uploads. Only sound preference and your best first-test count stay on this device.

Your first circuit in 30 seconds

1. Read the goal. Which labeled bulbs should light?

2. Repair the path. Tap a wire button to connect or remove it. Tap a switch to close or open it. Buttons marked “fixed” explain the diagram and cannot be edited.

3. Test. A lit bulb has rays and the word “ON.” Follow the dashed blue path. If the goal is not met, use the explanation or a hint and try again.

Tab moves between controls; Enter or Space operates a button. There is no timer, and every level is available. Hint use counts as coaching; Show solution completes the puzzle with a worked explanation.

Workshop complete

Level complete

Circuit Workshop

0First test
without hints
0After coaching
or retries
0Worked
solutions

Keep your work with a screenshot: Windows Win+Shift+S · Mac Shift+Command+4 · Chromebook Ctrl+Show windows. Nothing is uploaded.