Near by should be a bag of at least 60 pennies. They will then have someone slide pennies into the color cup of water, until the color water drips on the paper. Tell students not to throw the pennies, they want a drip not a splash. One student in the group should be designated to count the pennies going into the water. They are to this until there is a drip on the paper.
Surface tension builds around the cup, until it is broken with a penny.
Students will be asked to explain surface tension verbally. They will also be instructed to write one or two sentences defining surface tension.