We thought about all of the things we needed to keep fair- this took a lot of thinking!
Then we had a think about what made the best surface and made our predictions.
Then we tested scrunchy foil, smooth foil, fabric and sandpaper. Which one did Dastardly and Mutley like best and why?
It was really exciting watching the car go down the ramp and to see what a difference the materials made as to how far it went along our metre ruler.
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Please consider your words! Our children are delicate souls!