Grab the kids and have some fun. (1) Las Vegas Mini Gran Prix (1401 N. Rainbow Blvd.) lets you race your friends and family on one of four tracks for go karts or get silly on the slides at this family- fun zone. (2) Strike a pose with Sandra Bullock, Bradley Cooper or Celine Dion— and don’t forget your camera. (3) Madame Tussauds’ wax figurines at the Grand Canal Shoppes look so real you can shock your friends with photos of a chance encounter with a celebrity or two. It can be our secret. Come face- to- face with the ocean’s most dangerous predators and the gentle giants at the (2) Shark Reef Aquarium at Mandalay Bay. Feed the sharks, stingrays or sea turtles for a memory to take home.