After a $47-million dollar renovation, The Children’s Museum, one of Boston’s most-visited attractions, reopened to the public on April 14. Reflecting a need to be more child-friendly and accessible, the museum’s new features include an additional 23,000 square feet plus a fully landscaped outdoor plaza. Inside, visitors will find a climbing wall in the new atrium/lobby, a state-of-the-art stage for interactive theater performances, and a science playground/gallery focusing on environmental stewardship. Continuing with the environmental focus, the building renovations include energy-efficient lighting and plumbing, storm-water reclamation systems, and a “green” roof. The renovations were a joint effort between Cambridge Seven Associates (for the building) and Michael Van Alkenburg Associates (for the landscaping), among other New England architecture and design firms. The museum’s famous 40-foot-tall Hood Milk Bottle, a city landmark, was also refurbished (it celebrated its 30th anniversary on April 20).