Things You'll Need:
- clear plastic bottle
- Some water
- a few drop of blue food colouring
- funnel
- cooking oil
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Step 1
Fill a third of the bottle with the water.
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Step 2
Add the food colouring and swish it around until it is a dark blue colour.
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Step 3
top off the bottle with the cooking oil. use the funnel to make it easier.
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Step 4
Put the lid on as thight as it will go on.
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Step 5
tilt the bottle from side to side and wacth the waves.









