I don't want to bust your bubble - but my girls SHAKE at the fireworks they hear in the neighborhood - and they're in their house !
I'd never take them out to see them - I'd be afraid to traumatize them and I'd hate to make them more scared of loud noises -
What I do on Holidays.... is PLAY music to cover up the loud fireworks and make a game of the REALLY big boomers - I clap my hands and act like it's exciting to hear - all the while my girls are cringing and shaking cause they HATE fireworks - but after a few hours - they relax and I don't have to act like an idiot - but my advise is - I wouldn't do it if I were you -
If you think your baby can handle it - GREAT and maybe you will have fun

IT sure would be a good way to get them used to them....
but for me personally - I don't think mine would have fun at all