4 DIY Experiments to Learn About the Body

How do muscles make our arms move? How do hearts circulate our blood? Why can't we drink delicious, sugary soda all day, every day? This short, sweet list of DIY anatomy experiments will answer all those questions and more! Whether your child's an aspiring heart surgeon, or just curious about the way their body works, these activities make anatomy easy to grasp and are perfect for curious kids ages 7-10!

  • Visual aid of how to complete Muscle Machine
    Muscle Machine

    (Ages 9-16)

    There are lots of muscles that help to move your arm in all the many ways it can move. The bicep and tricep muscles are two of the most noticeable, partly because of how big they get on some bodybuilders. These paired muscles flex and extend the elbow joint, allowing you to bring a fork to your mouth or throw a frisbee. When one flexes, the other relaxes.

    In this muscle machine, you’ll be mimicking the action of a muscle by pulling a string. This is actually pretty similar to how your muscles work. Muscles are made up of long fibers of cells, kind of like bundles of string. The cells in a relaxed muscle fiber are long and skinny. When a muscle flexes, the cells yank themselves together, going from long and skinny to short and round. This shortens the muscle fiber too, so anything the muscle fiber is attached to will move in the direction of its contraction. The string mirrors this by changing its length when you pull on it.

    Download the printable here.

  • Visual aid of how to complete Pumping Heart
    Pumping Heart

    (Ages 9-16)

    Curious about how your heart pumps blood? Use this model to learn about the right atrium and ventricle!

  • Visual aid of how to complete Lung Model
    Lung Model

    (Ages 7-16)

    Breathe in. Breathe out. Do you feel your chest expand and shrink when you breathe? That change in size is how you get air into your lungs! It all has to do with the physics of air pressure, which you’ll investigate in this project.

  • Visual aid of how to complete What Soda Does to Teeth

    Why is soda bad for your teeth? My kids keep asking why they can't have more soda. The tooth fairy was kind enough to lend us some baby teeth for us to experiment with, and we got some very interesting results.

Get inspired!