DIY Project

Science

Oobleck

Cornstarch and water make a goo that's solid when you squeeze it and drips like liquid when you let go.

Oobleck
LevelBeginner
AgesAges 3 to 5
Time5 minutes to mix, then play
Cost$2 to $4

What you'll need

Materials

Tick them off as you find them.

Tools

  • Spoon

How to make it

  1. Step 1: Pour the cornstarch
    1

    Pour the cornstarch

    Have your child dump the cornstarch into the bin.

  2. Step 2: Add water slowly
    2

    Add water slowly

    Pour in the water a little at a time. Add a drop of color if you like.

  3. Step 3: Mix with hands
    3

    Mix with hands

    Squish it together. It'll feel stiff, then runny. Normal.

  4. Step 4: Squeeze a ball
    4

    Squeeze a ball

    Grab a handful and squeeze hard. It holds like a ball.

  5. Step 5: Let it melt
    5

    Let it melt

    Open your hand and watch it drip through your fingers.

  6. Step 6: Tap the top
    6

    Tap the top

    Tap the surface fast with a finger. It feels hard. Push slowly and your finger sinks in.

Edie's tip

Throw leftover oobleck in the trash. It can clog sink drains.

Written by the DIY Project team. How we check · Report a mistake

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