DIY Project
About

Science

Oobleck goo

Cornstarch and water make a goo that feels solid when you squeeze it and drips when you let go.

Oobleck goo
LevelBeginner
AgesAges 18 months to 3
Time5 minutes to make, 15 minutes to play
Cost$1 to $2
Rainy dayDollar store

What you'll need

Materials

Tick them off as you find them.

Tools

How to make it

Safety

Cornstarch is taste-safe, but a big mouthful could choke a toddler. Never pour it down a drain.

  1. Step 1: Pour the cornstarch
    1

    Pour the cornstarch

    Pour it into the dish.

  2. Step 2: Add water slowly
    2

    Add water slowly

    Pour in water bit by bit, stirring with your fingers.

  3. Step 3: Test it
    3

    Test it

    Punch it fast. It should feel hard. Then let it drip.

  4. Step 4: Let them play
    4

    Let them play

    Hand it over and watch the face.

  5. Step 5: Clean up
    5

    Clean up

    Let it dry, then sweep it up. Don't pour it down the sink.

Edie's tip

Add a spoonful more cornstarch if it's too runny.

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