Philosophical Parenting: Dealing with Toddler Tantrums

As a non spanking parent, what do you do with your toddler if he won't leave the playground when it's time to go? I've tried telling him I'm going and he's going to be left alone and I hide so he doesn't see me, but he doesn't care. Freedomain Radio is the largest and most popular philosophy show on the web - http://www.freedomainradio.com