To save Mr. Trump some time, here are some suggestions for planning an event, and how to register one's event with the IWPwD website. Perhaps a nice barbecue would be fun. Maybe they could have a pinata, since the concept of Mexico and beating things with a stick probably fit in nicely with themes he likes.
Of course, given his record I'm sure that the real estate businessman has his own ideas of some really fun things to do when it comes to others with disabilities. Joking about them being fat or what their physical looks are, or just the hilarious things they do with their flappy arms is perhaps more than enough.
Speaking of which, have you seen the TV ad which relates to all this that one of his opponents, Gov. John Kasich (R-OH) has started running about Donald Trump? It's quite good.