Headed to the movies today? Is ‘Iron Man 3’ in IMAX 3D on your menu list? If you are 25 and under then you are going to absolutely go bonkers for it. But if you are over 30, the fireworks will be a bit more restrained. You see, when one gets older, kid jokes are only so funny. You need a much more layered joke or gag to trigger the laughs. ‘Iron Man 3’ as fun and funny as it is, will do a better job playing to the teenage and young adult crowds than the mature grown ups preferring to see another sequel of The Dark Knight.