Kopa

Which Cloth Drinks the Most

Science
  • 4–8 years
  • 20 min
  • at home

Four materials get exactly the same three spoons of water, and only some of them drink it. Squeezing each one back out over a cup turns a guess into a real measurement.

What you need

  • Baking tray
  • Kitchen sponge
  • Paper towel
  • An old sock
  • Square of aluminium foil
  • Four cups
  • Spoon and water

How to play

  1. Lay the sponge, the paper towel, the sock and the foil in a row on the tray.
  2. Pour exactly three spoonfuls of water onto each one.
  3. Watch which puddles stay sitting on top and which ones disappear inside.
  4. Lift each piece and wring it out over its own cup.
  5. Line the cups up and see which material was drinking the most.
  6. Ask your child which of them would make the best towel and why.

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