The premier destination for fun science projects & experiments for kids grades K-8 since 2010!

Grade 3

  • Make a tin can telephone

    When you speak, sound waves are created by vibrations or back and forth movements in the air. In other words, one can say that the air gets compressed and decompressed by these sound waves in the air.

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  • Make static electricity using a Van de Graaff generator

    A 'Van de Graaff' generator is an electrostatic generator often found in school science classrooms. With this device, a high voltage electrical charge can be built up in its dome. Repel the strings from two teabags charged with a...

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  • Make a light bulb shine using a lemon as a battery

    Batteries works because of the energy released by a chemical reaction which is then changed into electrical energy or 'current'. Electrical current is caused by the movement of electrons through a complete circuit and can be used to light...

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  • Make an electrical door bell for your room

    In this science experiment we will study how electrical circuits are useful to us in our everyday lives. Many electrical devices works because of the fact that electrical energy can be converted into another type of energy that is...

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  • Use LED lights to decorate a paper X-mas tree

    Many very complex electrical circuits exist today, from radios, cell-phones, GPS systems and many others. These are all based on very simple electrical circuits, like the one in the experiment below, connected together to form such an appliance.

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  • Remove the tarnish off silverware using an electrolyte

    In a process called 'electroplating' it is also possible to reverse the process and 'add' electrons to a metal by taking the electrons from a more 'active' metal such a copper and fusing them to a metal such as...

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  • Learn how to read an electricity consumption meter

    It is easy to read an electric meter. In this science experiment, learn how to read and interpret an electricity consumption meter and make graphs comparing your household weekly usage.

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  • Learn about the speed of various falling objects

    Gravity can be explained as the force with which the earth attracts bodies near its surface. Gravity causes a falling object to hit the ground with a thud. The greater the height from which an object falls, the bigger...

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  • Defying gravity with centrifugal force

    Gravity can be explained as the force with which the earth attracts bodies near its surface. You will know the effect of this force if you have ever fallen down on the playground! One way to work against the...

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  • Tell the time with your own water clock

    In the old days telling time was not as easy as it is today. They used hourglasses, candle clocks and a device called a water clock. Do the following science experiment to learn how water can be used to...

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