Egg Drop Challenge

What You’ll Create

Take on one of the most famous engineering challenges ever given to a school class — the egg drop! 🥚 Your mission is to build a protective container from simple household materials that will stop a raw egg from breaking when dropped from a height. There is no single right answer — the fun is in experimenting with different designs and figuring out why some work and some do not.

How to Set It Up

Step 1: Plan Your Design

Before picking up any materials, sketch your design on paper. Think about what will absorb the impact: soft padding, a crumple zone, or something that slows the fall? Common approaches include surrounding the egg with cotton wool, creating a straw cage to distribute the shock, or using a balloon as a bumper. Draw your plan and label the materials. The best engineers plan before they build.

Step 2: Build the Container

Construct the outer shell of your container using cardboard cut from a cardboard box and straws as structural rods. Shape the cardboard into a box, a cylinder, or whatever shape your design calls for. Use tape to hold all the joints firmly. The outer shell should be sturdy enough to hold its shape through the impact but also have somewhere for the force to go.

Step 3: Cushion the Egg

Wrap the raw egg in several layers of cotton wool — the more the better. Place the cushioned egg inside the container and pack more cotton wool around it to fill any gaps. The egg should not move at all when you shake the container gently. Seal the container shut with tape so nothing falls out during the drop.

Step 4: The Drop!

Find a safe outdoor drop zone (a paved area works well) or drop from an indoor staircase. Hold the container at arm’s length above your head — roughly 2 metres — and drop it straight down. Do not throw it. Open the container and check the egg. Did it survive? If not, study where it cracked for clues about how to improve your design. ⚠️ Adult supervision required for higher drops.

Have fun!

• 📐 Once you succeed at 2 m, challenge yourself with 3 m, 4 m, or off a balcony.
• ⚖️ Add a weight limit — your whole package must be under 200 g. Can you still protect the egg?
• 🧪 Try a bare egg with no protection first so you understand the problem.
• 🏆 Compete with a sibling or friend — whose design survives the highest drop?

Why It’s Amazing

• Engineering Design Process: Plan, build, test, analyse, iterate — this is the complete engineering cycle in a single afternoon. ⚙️
• Physics: Force, impulse, and energy absorption become real when a dropped egg either survives or splatters. 🔬
• Critical Thinking: Examining a cracked egg to understand where the design failed is genuine forensic analysis. 🧠
• Resilience: When the first design fails, children naturally want to rebuild and improve — exactly the mindset that produces engineers. 💪

Pro Tips

For ages 7–9: Provide a limited set of materials and let the child choose. Keep the drop height to 1–1.5 m and focus on the excitement of the test rather than the engineering analysis.

For ages 9–12: Add constraints — a material budget (each item has a point cost), a weight limit, or a size limit. Require a pre-drop prediction and a post-drop analysis in writing.

For ages 12+: Introduce the concept of impulse (force × time). Challenge the child to maximise the time over which the impact force acts rather than just adding more padding. Research real-world parallels: car crumple zones, sports helmets, airbags. 🚗