Photos are needed. The East Tennessee Children’s Museum first opened back in 1987. Now, three and a half decades later, Hands On! Discovery Center is set to honor the museum’s legacy and the community with a special project.“A mosaic collection of photos,” museum director and CEO Andy Marquart said. Marquart said the photos can be of individuals or families, either relaxing at home or out exploring in the community. Once received your phots will become part of the permanent display.