Day 1 — Balloon Car Challenge Focus: forces & motion, friction, air pressure, iteration
- S1: Intro to Motion
- Explore push/pull, friction, and rolling resistance with quick demos.
- Materials orientation: straws, skewers/axles, wheels, balloons, tape, chassis options.
- Safety and testing rules overview.
- S2: Build Your Car (Prototype A)
- Assemble a basic balloon car chassis; align axles; ensure free‑spinning wheels.
- Predict distance and straightness; record a plan.
- S3: Test and Tune
- Run controlled tests (3 trials). Measure distance, drift, and time.
- Reduce friction (wheel spacing, axle sleeves); improve sealing around the balloon nozzle.
- S4: Friendly Show & Tell (45 minutes)
- Share two demonstration runs for distance and straightness.
- Reflection: Which change made the biggest difference? Capture data and a photo.

