P.W.
Oh yes! We had some of the best 4ths of July when we lived places that allowed people to set off their own fireworks at certain locations.
Most people will probably freak out and tell you no, but I always let my little ones use sparklers. I don't remember about toddlers, specifically. I probably helped them hold them, so they wouldn't stick them in their eye.
I grew up in Mexico, where it was common for people to do all kinds of crazy things with fireworks, so I think differently about it than most.