Engineering activity
Skyscraper Challenge
Build the tallest building you can using index cards and tape. See if it can stand taller than you!
Materials and setup
- index cards
- tape
- ruler
- scissors
How this changes by age
Pre-K (ages 3–4)
Build the tallest building you can using index cards and tape. See if it can stand taller than you!
Steps
- Fold index cards in half to make little tents and L-shapes.
- Stack folded cards on top of each other to build upward.
- Use small pieces of tape to hold wobbly spots.
- Measure your building against your body — is it taller than your knee? Your waist?
- When it falls, look at what happened and try a different way to stack.
- Tell a grown-up one thing that surprised you.
Learning objectives
- Explore vertical building and gravity's pull on tall structures
- Discover that folded paper is stronger than flat paper
- Practice measuring and comparing heights
Kindergarten (ages 5–6)
Design and build a skyscraper using only 30 index cards and 2 feet of tape. It must stand on its own for 30 seconds.
Steps
- Rules: 30 index cards, 2 feet of tape, must stand for 30 seconds with no support.
- Plan your design: draw a picture showing how you will fold and connect the cards.
- Try different techniques: rolling cards into tubes, folding into triangles or boxes.
- Build your skyscraper. Time it — does it stand for 30 seconds?
- Measure the height. Write down your measurement.
- If it falls before 30 seconds, observe what went wrong and rebuild with a different approach.
- Tell a grown-up one thing that surprised you.
Learning objectives
- Plan and execute a building project within material constraints
- Discover that tubes and folded shapes are stronger than flat cards
- Measure height and time to evaluate structural success
Early elementary (ages 6–8)
Engineer the tallest freestanding structure using exactly 50 index cards and 3 feet of tape. It must survive a wind test (blow dryer on low) for 10 seconds.
Steps
- Constraints: 50 index cards, 3 feet of tape, must survive 10 seconds of wind from a blow dryer on low setting.
- Research: what makes real skyscrapers resist wind? Cross-bracing, tapered shape, wide base.
- Sketch at least 2 designs. Predict which will be taller and which will resist wind better.
- Build your chosen design. Measure height.
- Wind test: hold a blow dryer on low 12 inches away for 10 seconds. Did it survive?
- Record results and improve. Try your second design and compare both.
- In one sentence, tell a parent or sibling what surprised you today.
Learning objectives
- Design structures that resist both gravity and lateral wind forces
- Apply cross-bracing and tapering concepts to improve stability
- Compare predicted vs actual performance across multiple designs
Upper elementary (ages 8–10)
Design a skyscraper optimized for height, wind resistance, and earthquake survival. Calculate height-to-base ratios and document structural engineering decisions.
Steps
- Research real skyscraper engineering: core structures, outrigger trusses, tuned mass dampers, setback designs.
- Design a skyscraper using 75 index cards and 4 feet of tape. Create a blueprint with dimensions.
- Build incorporating at least 2 real engineering techniques from your research.
- Test 1: Measure maximum height while remaining freestanding for 60 seconds.
- Test 2: Wind test with blow dryer on low for 15 seconds.
- Test 3: Earthquake test by gently shaking the table for 10 seconds.
- Calculate your height-to-base-width ratio. Write a report on which techniques most improved performance.
- In one sentence, tell a parent or sibling what surprised you today.
Learning objectives
- Research and apply real-world skyscraper engineering techniques
- Test a structure against multiple types of forces (gravity, wind, seismic)
- Calculate structural ratios and analyze how design choices affect performance
Safety and evidence note
Read the full activity before beginning. An adult should supervise tools, heat, food, outdoor work, movement, and experiments as appropriate. Completion records that the activity was done; the child’s explanation, work sample, photo, or demonstration is stronger evidence of learning than a completion check alone.
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