MUD!

Squish squish between my toes
greatest sound I'll ever know,
mud picked up and dropped down
and goes splat all over the ground.

made by water mixed with dirt
when its slushy it can't hurt
mud a wonder of natures land
mud can also be made by man.

very useful in many ways
it turns up on rainy days
the greatest thing that will ever be
mud for you and mud for me!