Sheriff's spokesman Jim Amormino says the machine's controls were 20 inches from the floor and the start switch was a simple push button.
The girl was in the water-filled, tumbling machine for at least two minutes before her mother found her. Her death was ruled accidental.
Investigators say the mother could not explain why Kayley climbed inside the machine.
Says Amormino: "They don't know if they were playing or what."
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