Water Squirter

A squirt gun is a a great example of what happens when you apply pressure to a liquid. In this quick, fun experiment, learn how to make your own miniature water squirter using just two cups, a straw, and some clay!

  1. Ages: 5 - 16

  2. <30 minutes

  3. Messy

Step-by-step tutorial

  • Step 1

    Gather your materials!

    Photo reference of how to complete step 1

  • Step 2

    Cut one of the plastic cups in half. Cut two small slits on the sides of the bottom half. This will be the plunger.

    Photo reference of how to complete step 2

  • Step 3

    Use a pencil to poke a small hole in the bottom of the other cup.

    Photo reference of how to complete step 3

  • Step 4

    Push the straw through the hole. Curve the bendy part up.

    Photo reference of how to complete step 4

  • Step 5

    Press putty or clay around the straw to seal up the hole.

    Photo reference of how to complete step 5

  • Step 6

    Hold your finger over the end of the straw and pour water into the cup

    Photo reference of how to complete step 6

  • Step 7

    Angle the cup so that when you take your finger off the straw, no water comes out.

    Photo reference of how to complete step 7

  • Step 8

    Hold the plunger by the bottom and quickly push it into the cup. As you push the plunger in, you'll see a squirt of water come out of the straw!

    Photo reference of how to complete step 8

  • Tip

    The cut slits in the plunger will help the cup flex as it goes inside the main cup. This will help the water squirt better!

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