How to Make a Rainbow in a Bottle

Make a rainbow with your children on a sunny day.
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There are many magical tales about rainbows such as finding a pot of gold at the end of a rainbow. Children often draw pictures of these beautiful colors in the sky in the shape of an arch over the land. Rainbows are usually made after a good hard rain with the reappearance of the sun. When the light and water combine, different colors are reflected. You don’t have to wait for a hard rain to see the colors in a rainbow. You can make a rainbow with a bottle and water.

    Pour water in the glass bottle until it is full. Screw the cap on tightly.

    Place your glass bottle directly in the sunlight on a window sill or a table that you can place something underneath it.

    Move the bottle so it hangs over the window sill or table without falling to the ground.

    Put the white construction paper on the floor, underneath the part of the bottle hanging over the table.

    Check the white paper for rainbow colors. If there are no colors, move the bottle around a little until you see a rainbow reflected on the white construction paper. You may choose to copy the rainbow colors on the construction paper with the watercolor paints and brush.

    Things You'll Need

    • Clear glass bottle and cap
    • 1 sheet of construction paper
    • Watercolor paint
    • Brush

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