Learn about surface tension by finding out how many drops of water you can get to stay on the top of a coin.
> Pipettes (water droppers) - In NZ these can be purchased from Office Max, Easy Grow or online companies such as The Science Shop, Fishpond
> 50c Coin for each person
> Cups of water
> Get the girls to use the pipette and try to put as many drops of water as they can onto the 50c coin
> Keep score - see who does the most!
> Follow this link for info about surface tension and this experiment: http://kidsactivitiesblog.com/12902/what-is-surface-tension