If you have kids between the age of 2 and 22, you are going to want to check out Sky Zone in Van Nuys (http://www.skyzone.com/VanNuys). It is a trampoline park and you pay by the hour. They have multiple trampoline set-ups, which include jumping into a foam pit, dodge ball courts and of course the basic trampoline run.
My 4-year old son and I went and it was amazing. A great workout for mommy and a good time for him. We were both exhausted at the end of our hour.