As a guest, I mean. Is there a minimum age?
Well, my 2 month old cousin once removed was a bit too young to participate in the dancing at my wedding, but I’d still have to say there isn’t one. Little kids like to dance, and it would be a shame to make them sit on the sidelines while the adults have all the fun. As far as I’m concerned, if there’s going to be dancing, let everyone who wants to get up and dance! 
Bonus points to any adult who dances with a kid.
Oh heck no! I have pictures of four year old girls dancing with their feet on a grown man’s shoes, and of very young children dancing with each other–cutest thing in the world is a tuxedoed ring bearer dancing with the flower girl, awww! Far as I can see, if you’re invited to the reception you can dance!
Man, people worry too much.
What? Are you serious? No.
So, dancing at the same time as the adults is okay? As opposed to running and sliding on the dance floor before the music starts, but being obligated to get out of the way when the grownups are dancing?
As soon as you can walk, you can dance. I’ve been to weddings where the little kids are the only ones who are dancing!
Of course! Why on earth wouldn’t it be?
If you’re younger than 2, you’re required to dance on the shoes of a parental figure.
Because most dancing adults do not keep their eyes at two to three feet above the floor. One poorly timed spin out could send the little kids skittling about like bowling pins.
But of course the kids will dance; kids love to dance.
2.5 is the minimum. That’s about the right age where you can stand by yourself without falling down repeatedly. I don’t understand your reasoning as to why there would be a higher age limit. What were you imagining?
Yep. If you’re invited to the wedding, you’re invited to dance. Wise parents will cordone off a little area just off the edge of the dance floor with chairs or something to create a toddler dance pit, but it doesn’t always happen. Tying helium balloons to the small dancers makes them easier for adult dancers to avoid stomping.
Oh for godssake. Any adult who can’t bear the thought of sharing the dance floor can get their groove on at a nightclub. Kids dancing at a wedding is a hallowed tradition and everyone’s favorite memory; weddings are all about families and multiple generations getting together to celebrate. I think most adults can be trusted to be responsible enough to watch out for ankle-biters possibly being underfoot
Absolutely. And that’s how kid’s learn to be nimble and quick, just like Jack!
The toddler mosh pit is a great idea.
Helium balloons taped to the back of small persons is also good, but as the balloons follow the child, it is easy to think the child is another half-meter away when it’s really underfoot.
If you are doing stand-and-sway dances, then any age on the floor is fine. If you are doing a speedy polka or turning waltz, the children must stay in the “slow lane” in the middle of the dance floor, same as any slower-moving couple.
Have you ever been to a quinceañera?
Old enough for the music to move them.
I have some extremely cute pictures of little kids dancing at my wedding. They didn’t get in anyone’s way.
Eh - take about a year off that ;). The last wedding my girls (then 3.5 and 1.5) went to they literally danced till they dropped - at the point at which they were no longer continually leaping and spinning around the dance floor, but instead having a little spin, falling down then attempting to crawl to the music - that was when we figured it was time for bed.
Between toddler bedtime and reception end was plenty of time for the grown-ups to groove by themselves anyway.
If it’s that big of a deal, then have a kids-free wedding. (NOT that I’m knocking people who choose to do so, by the way)
Otherwise, if kids ARE there, well, then, they’re perfectly free to dance with the adults as well-they are guests, and weddings are usually family affairs. Suck it up.