Red cabbage colour potions

What you need

• A quarter of a red cabbage
• A pan and a sieve
• Clear cups or jars
• Lemon juice, vinegar, bicarbonate of soda, soap

How to do it

1. 1

   Simmer chopped cabbage in water for ten minutes, then cool and strain the purple liquid.

2. 2

   Pour a little into six clear cups.

3. 3

   Add a different kitchen ingredient to each one and stir.

4. 4

   Line the cups up from pinkest to greenest and talk about acids and alkalis.

5. 5

   Predict what toothpaste or fizzy water will do, then test it.

Try this next

• Cardboard box marble run

  Cut, fold and tape a run that keeps a marble moving from the top of the box to the bottom.

• Pasta skeleton

  Lay out dried pasta shapes to build a human skeleton and name the bones as you go.

• Rain in a jar

  Make warm water, cold air and a plate work together until it rains inside a jar.