If you promised the kids a trip to COSI in the near future, don't forget the science museum will soon close for its annual maintenance regimen.

COSI will be closed for cleaning and maintenance from Sept. 6-23, according to Jaclyn Reynolds, director of communications.

That means Sept. 5 is the last chance to see some exhibits and shows, including Game Masters: The Exhibition. The National Parks Adventure 3-D movie will return after the break and run through Nov. 20.

COSI will reopen Sept. 24 with a new exhibit and a different lineup of planetarium shows, though Reynolds said Jr. Star Safari will continue.

The new exhibit, How People Make Things, is based on factory tours shown on Mister Rogers' Neighborhood. The touring exhibit, which includes hands-on activities, was created by the Children's Museum of Pittsburgh and Fred Rogers' company, Family Communications Inc.

According to COSI, How People Make Things, which runs through Jan. 8, includes activities such as cutting wax with hand tools, deforming a wire, learning how vacuum forming is used to make ice cream cups, assembling a golf cart and trolley, trying out injection molding and learning how crayons, baseball gloves and carousels are made.