15
Experiment time!
1.
Fill the neck of the bottles with
plasticine.
3.
Put 12-16 coffee filters into
each bottle.
2.
Put the straw in the plasticine
hole.
4.
Attach the bottles and the
funnel to the cardboard.
5.
Put food colouring in water and
pour into the bottles.
Our working kidneys!
You need:
2 half litre water bottles
coffee filters
plasticine
cardboard
funnel and container
flexible straws
food colouring
