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About this activity
Cardboard Box Marble Run turns a delivery box into a gravity track using cardboard strips, toilet rolls, and masking tape. Children test angles, rebuild failed runs, and race two marbles. Low-cost engineering that works for school holidays, rainy weekends, and older siblings who outgrew simple kitchen-roll ramps.
Print & play
Download the Marble Run Design Planner sheet
A sketch-and-test planner for cardboard marble runs — plan tracks, note fails, and record the winning design.
View Marble Run Design PlannerMaterials needed
- Cardboard box
- Toilet or kitchen rolls
- Masking tape
- Scissors (adult help)
- Marbles or small balls
Preparation time
10 minutes
How to play
- 1Stand a cardboard box on its side and sketch a zigzag path from top to bottom in pencil.
- 2Tape cardboard strips or half-tubes as tracks, starting with a steep first drop.
- 3Drop a marble from the top — if it sticks, raise the track angle or widen the channel.
- 4Add one ‘trick’ section: a jump gap, a spiral tube, or a fork that sends marbles left or right.
- 5Time three successful runs and sketch the winning design on paper for next time.
Learning benefits
Engineering thinkingProblem solvingPersistenceSpatial reasoning
Best for
Tags
rainy-dayindoorfreeKS1KS2age-5STEMafter-schoolschool holidays
Seasons
all year
Occasions
rainy dayafter schoolschool holidayweekend
Key stages
KS1KS2
Weather
RainyColdAny Weather
Safety note
Adult supervision is recommended. Adapt the activity based on your child's age, ability, and environment.
