The Hanson Children’s Museum recently adopted a new name. To better reflect its intention to serve the whole region, the nonprofit changed its name to the South Shore Children’s Museum. The action comes at an eventful time for the museum, which was begun in 2009 by Hanson resident Juvelyn Hartweg. After operating as a traveling museum for its first four years because it lacked a facility to house its exhibits, the museum last August began operating from a storefront space in the Hanover Mall at a significantly discounted lease rate through a temporary arrangement with the mall. Recently, the mall agreed to extend the lease at least through June, Hartweg, the museum’s director, said in an interview. Meanwhile, the museum has lined up a major new sponsor, soon to be announced, that will help pay for its operations, marketing, and its effort to maintain and expand its space at the mall. Hartweg said the museum is also preparing to apply for a state Cultural Facilities grant to futher support those needs.