The inky dinky spider went up the water spout
Down came the rain and washed the spider out!
Out came the sun and dried up all the rain
And the inky dinky spider
Went up the spout again!

Variations:

The 'eency, weency' spider went up the water spout, etc. (quiet, high voice)

The 'great, big' spider went up the water spout, etc. (loud, low voice)