💡 Primary Maths & Science Games · Grade 4 science · Simple circuits
Light the Bulb: Build Simple Circuits, Add a Switch, Find Faults
For the bulb to light, current must leave the positive end, pass through both contacts of the bulb and return to the negative end. Wires join only at terminals, short circuits are flagged, and the textbook circuit symbols are shown. (For secondary-school faults and rheostats see the circuit fault simulator.)
- Free, no sign-up
- Ad-free play area
- Tablet friendly
- Parent mode
- A4 worksheet
- 4 levels
How to play
- In Explore, drag from a blue contact to add a wire between the battery, bulb and switch. Drag parts to move them and tap the switch.
- Use the parts box to add a second battery or bulb and the test clips, then test a nail, pencil lead or plastic ruler.
- Levels: light the bulb, switch control, find the fault, conductors and insulators.
Curriculum unit
Primary science, grade 4: electricity in daily life, lighting a bulb, simple circuits, finding faults, conductors and insulators, and switches (Jiaoke edition, grade 4, book 2, unit 2).
For parents and teachers
Only a 1.5 V cell circuit is simulated, never mains electricity. Mistakes are grouped as open circuit, short circuit, one bulb contact only, switch not in the loop, wrong fault and conductor choices.