Conker ramp races

What you need

• Conkers, marbles or small balls
• A baking tray, tea tray or piece of card
• Books to raise the ramp
• Tape measure or a shoe to measure with

How to do it

1. 1

   Prop one end of the tray on a book to make a gentle ramp.

2. 2

   Roll a conker from the top and mark where it stops.

3. 3

   Add a second book, roll again from the same place and measure.

4. 4

   Keep adding books, recording each distance, and predict the next one.

5. 5

   Try a marble and a scrunched paper ball and talk about why they differ.

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