Tonca the alligator snapping turtle turns 46 this year and the Museum of Science and History (MOSH) is hosting its regular birthday bash (hosted by Daisy Mae the Opossum) on July 14 from 1 to 3 p.m. with games, facepainting, cake and the traditional weigh in.  But here’s the deal: If you book a child’s birthday party while at the museum for Tonca’s event, you’ll get 10-percent off.  Packages start at $100.