You will need:

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    Three sponges
    Scissors
    Pen and ruler
    String

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Use new sponges, and be sure not to wet them ahead of time; they are easier to cut straight out of the package
With a pen and a ruler divide sponge into 5 strips, these sponges measured 5 x 2cm strips)
Use scissors to cut the sponge
Repeat with the other two sponges.

Lay strips on top of each other in three layers,

Tie them across the middle with a piece of string; knot it tightly.
Fluff pieces out into a ball

Wet and enjoy throwing them around on a hot summers day!

Sponge Ball