It’s Science Time – Make a Flashlight

The wide world of cool science has so much to offer for children of all ages. Through the employment of kids science, your children can begin to understand all of the incredible and awe inspiring phenomena that occur in the world. And there is no age too young to begin learning about all of the exciting things around you!

But don’t think that all kids science projects have to be complex undertakings that require an in depth knowledge of the inner workings of the world – in fact, something as incredible as building a homemade flashlight can be done with a little bit of patience and a love for cool science.

So if your child loves to learn about the world, try this kids science project and build a shining light of your own.

What You Will Need

  • A torch bulb (Not the threaded kind)
  • 2 D batteries
  • Speaker wire (copper kind)
  • Tape
  • Scissors
  • Any art supplies you want to color and decorate your flashlight

Basics of the Project

The premise of this kids science project is very simple. You will need to tape one end of the covered copper wire to the base (negative end) of one of the batteries, and set them both together. Then, take the light bulb and place it atop the positive end of the second battery, ensuring that it fits tightly and they are in contact with one another at all times. Finally, take the wire and place the loose end at the silver portion of the light bulb – if the connection is in existence it should light up automatically. If it doesn’t light up, or flickers, the connection is faulty – check to make sure that the batteries are touching the wire, and that the wire is touching the bulb at all times.

This is your basic flashlight!

Make a Case

Now that you have the basic design down, though, it is time to make a case that will hold your new kids science project. One of the easiest ways to create a case is by using cardboard rolled into a small tube in which the batteries can fit snugly. You can also experiment with using pieces of cardboard boxes, paper, or even aluminum cans to create the sturdiest flashlight case you can.

After you have decided upon a case, it’s time to make a clear cover that can protect the bulb and help project the light. For this it is easy to use simple clear food wrap, or even a thin piece of clear hard plastic. Try lining the edge of the flashlight case with protruding tin foil as well – this will reflect the light and sharpen the projected beam.

If you would like to make an “on/off” switch for your flashlight, instead of connecting the tip of the wire to the light bulb, leave it disconnected, but secure the speaker wire with a paper clip that is protruding outside of the case. Make it so that when you move the paper clip forwards, the wire connects to the bulb – this will allow you to turn your flashlight on and off whenever you would like!

Science of Light

Making a homemade flashlight is a great way to introduce your children into the fun world of cool science projects. Use this as a guideline to get started, and employ some of your own creativity to make a finished product that will shine a little bit of light in your lives!


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