Science for Kids: Plants and sunlight

tomato seedling following the sun

Our summer gardening experiment has led to several questions about plants. I explained that plants get energy from the sun, and designed this simple experiment to teach my kids how important the sun is to plants. We put a tomato seedling in front of a window, and observed that it bent its stem to expose its leaves completely to the sun. Then we marked where the leaves were leaning (see the right edge of the pot), and turned the pot so that the plant was facing away. We did this several times, noting each time that the plant would change directions to get as much sunlight, and always marking the edge of the pot that the leaves were closest to. It’s an experiment I hope to repeat with my kids over the years, explaining what is going on in greater complexity as they grow older.

The experiment definitely made an impression on Emma – she has been drawing plants in the sun ever since, like this:


The little animal on the top right is a bumblebee, pollinating the flowers =)

What are your favorite experiments and other science activities for kids?


  1. says

    That’s such a fun learning opportunity. We did something similar when my daughters brought home potted sun flowers from school. They kept asking why the flowers were “bending to the window,” which led to a discussion about why the sun is important for plants.
    .-= Quadmama´s last blog ..Our Mini-Vacation =-.

  2. Valerie @ Frugal Family Fun Blog says

    Love her drawing! Sounds like she is really understanding the concept quite well. We just read Leaves, Leaves, Leaves and Emily really enjoyed it.
    .-= Valerie @ Frugal Family Fun Blog´s last blog ..Super-Easy Cool Comets =-.

  3. maryanne says

    Thanks everybody! And Natalie, I can see why you thought it was a rake – I was a little surprised when she said they were flowers ;)


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