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The lack of noxious fumes has made recent Rittenhouse addition Tierra Mia organic nail spa popular for those with child (and those who have young children). Get the Magdalena ($50 pedi/$25 mani), which revives tired feet and uses water-based polishes, so toxic elements stay out of your body and baby’s mouth. 328 South 17th Street, 215-735-7980, tierramiaorganicnailspa.com.