{Water Experiment} Water on a Penny

Here’s a fun water experiment to get kids interested in science.  And the supplies are simple – drops of water on a penny.  Kids Activities Blog loves hands-0n projects like this that use simple supplies from around your home.  Have fun!

You may have heard the old saying “How many angels can dance on the head of a pin”. Well, my son and I decided to find out how many water droplets can sit on the head of penny.

We gathered all the supplies we were going to need to find out exactly how many drops would fit.  We needed a water dropper or pipette, a penny, a measuring cup filled with water, and a plate to hold the penny.

water experiment

Water Experiment

Before we got started we discussed how many drops we thought could fit on the penny.  My son predicted fifty and I guessed about fifteen.  Then we talked about what size drops we thought we would need to add to the penny to get the number of drops we had guessed. We decided that we would need to add really big drops to have fifteen. Really tiny drops would help us get closer to the fifty drop my son had guessed.

My son filled the pipette with water and slowly started dropping water on the penny. As you can guess he was trying to make the smallest drops possible.

water on a penny experiment

Water on a Penny

At this point he had about nine drops on the penny and the penny was looking almost half way filled. I asked him if he wanted to change his estimate and he did not. He stood firm with his guess of fifty. I did notice the drop got a tab bit smaller as he continue to drop water on the penny.


water experiment for kids


By the time I took the picture above he was at nineteen drops and it was really looking we weren’t going to get to fifty.


water experiments

When we reached the twenty fourth drop, we both realized the water was going to overflow. It was then and only then that he wanted to change his guess to twenty five.

Sometimes you have to do an experiment to see what will really happen. I bet if we tried this experiment again he would guess a number closer to twenty five.  In fact I think he probably would guess twenty five exactly.

More Kids Activities

Kids love to play with water so why not add some learning fun with some water experiments.  This water on a penny experiment is just one of many great ideas.  Here are a few more kids activities working with water:

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About Deirdre

Deirdre Smith writes/owns JDaniel4’s Mom. After twenty years as a elementary school and technology resource teacher in Northern Virginia, she became a stay at home mom in upstate South Carolina. Her blog features ways she and her 5 year old are exploring learning, crafting, creating healthy meals and living life to its fullest. Deirdre can also be found on twitter as @jdaniel4smom and on her blog's FB page. You can also check her out on Google+.