How to access simplexmlelement values?

SimpleXMLElement(
	@attributes =array(
		['created'] =>		'02 Apr 2013 20:33:51'
		['creator'] =>		'George'
		['format'] =>		1.0
	)
	Device =	SimpleXMLElement(
		@attributes =		array(
			['name'] =>		'Lucy'
			['old_name'] =>
			['phone'] =>		'555-1212'
			['state'] =>		3
			['type'] =>		'blonde'
			['version'] =>		'36C'
		)
		Configuration =	SimpleXMLElement(

			@attributes =		array(
				['time'] =>			418250031
				['trait'] =>			'available'
			)
		)
	)
)


How do I echo the 'name' so that my output says "Lucy"?

I get that if I set this equal to $xml I would then echo $xml['created'] for the creation date. How do I get to consecutive levels of data?