Simple Science: Drops of Water on a Coin

Around here, we love doing Science Experiments, but we are all about SIMPLE science activities that require little to no prep!

Child Using Water Dropped to Place Drops of Water on Coins

So many of our favorite explorations have come from the book Science Experiments for Young Learners.

I realize the cover of this book looks a little dated (I’ve had it for years.), but it is a gem of a book, and this science challenge is a favorite from inside.

Young Child Doing Simple Science Water Activity

This particular SIMPLE science experiment was definitely a hit, and my kids have continued wanting to explore with it time and time again!

Medicine Droppers, Coins, and Water on a Round Metal Tray

Water activities seem to always go over well around here.

Simple Science Activity on Plastic Tray

Simple Science: Drops of Water on a Coin

To get started, gather the following for each child:


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  • a variety of coins
  • a water dropper of some kids – There are cute ones available like these or these, but you can also use a medicine dropper.
  • a small container of water
  • a plate or tray to catch any overflow of water

The great thing about an activity like this is you probably already have most, if not all, of these supplies already on hand.

Water Droppers and Medicine Droppers - Supplies for a Science Activity

Next, ask the following question and begin exploring together:

A Row of Coins Preparing to be a Used for a Science Experiment

“How many drops of water can you fit on the head of each of your coins?”

A Drop of Water on the Head of a Coin

Yes, we made predictions…

Water Droplets Being Dripped Onto the Heads of Coins

…counted drops of water…

…chatted about coin values…

…talked about the pictures found on each coin… Who were these men? What is that on the back of the coin?

A Row of Coins Preparing to be Used for a Science Experiment

…discussed water tension – and on and on it can go!

Droplets of Water Being Dripped onto Coin Heads

With an activity like this, you’ll be amazed at where the conversation naturally goes!

Young Child Doing Science Experiment with Water

This activity gifted us with so many opportunities to tie together all kinds of different things we have learned together over the years.

I love teaching and learning that way. It just works!

The first time we tried this activity at home, I wasn’t sure if my younger kids would have the patience to join in with their older siblings, but they did.

Science Experiment Set Up on a Plastic Tray

This is a fantastic activity for kids of all ages with fine motor skills strengthening opportunities for everyone involved.

A Row of Coins Preparing to be Used for a Science Experiment

My kids have really enjoyed this activity over the years. Be sure to let us know if you give it a try!

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