Sticky Ice

Is it possible to remove ice from a bowl without getting your hands wet? You can if you know the science behind it.....

  1. Ages: 3 - 8

  2. <30 minutes

  3. A little messy

Materials you'll need

Step-by-step tutorial

  • Step 1

    Have a friend you want to challenge? Hand your friend a piece of string, and tell 'em to get the ice out of the bowl without getting their hands wet!

    Photo reference of how to complete step 1

  • Step 2

    The first thing we had to do was put a bit of water in the bowl with the ice.

    Photo reference of how to complete step 2

  • Step 3

    We put the string in the bowl. Can we get the ice out?

    Photo reference of how to complete step 3

  • Step 4

    After leaving the string in for a minute or two and waiting, we pulled on the string. Anything? Nope! Nothin'.

    Photo reference of how to complete step 4

  • Step 5

    Hmmm. We put the string back in the bowl,

    Photo reference of how to complete step 5

  • Step 6

    added some salt, shaking it over the string....

    Photo reference of how to complete step 6

  • Step 7

    Madeleine had to get fancy, and ran off to get the timer...

    Photo reference of how to complete step 7

  • Step 8

    Waiting for about a minute....

    Photo reference of how to complete step 8

  • Step 9

    And will it work? Yes! So... is salt sticky? Magic? Not quite....

    Photo reference of how to complete step 9

  • Done!

    The freezing point is lowered by the salt (freezing is usually 32 degrees), so the ice melted a little and trapped the string, and then refroze again! It wasn't the ice but the unusually cold water that was making our science seem like magic. Now you know the facts... Who are you going to challenge with your mad scientist skills?

    Photo reference of how to complete step 10

You might also like

Share what you made & tag us at!

;