Marketed as the African American Chatty Cathy, these vintage dolls are the most valuable of the bunch. For example, one doll with a working — albeit off-kilter — voice box sold for $600 on eBay.

Barbie and Ken dolls will be part of the temporary exhibit from 1 p.m. to 2:30 p.m. on Saturday, June 8, during a free event hosted by the Over the Rainbow Doll Club at Trinity Episcopal Church ...