Two flower girls and two ring bearers??

Personally, I wouldn't have many/any expectations for any children younger than 3-4 yrs. You can have the little ones wear cute/matching/coordinating outfits and be "honorary members of the wedding party," but they will be babies, so I'd plan on having a parent/grandparent hold them for the wedding and then get a couple of cute photos with them, if they are willing to cooperate. Daughter's 2 FGs and 2 RBs were siblings, 4, 6, 8, and 10, and the two youngest ones barely made it through the afternoon wedding (and the 4 year old was asleep before dinner was served at the reception and slept on a piece of lounge furniture all night until the parents packed everyone else in about an hour before the reception officially ended). I think it's sweet to want to include really young kids/babies, but it's also important to consider what's developmentally reasonable given their ages.

We are having 2 ring bearers and 3 flower girls! My niece and FH god daughter will be 2.5 at time of wedding. We decided to include FH niece who will be 8 as an older one to help the little ones out so I think that’s perfectly fine!

I think that even 2 years old is pushing it in terms of age...if you really wanted to incorporate them, you could have them in a wagon, or like a PP commented, have them as “honorary” party members. I personally wouldn’t have kids that young just because you can’t predict how they’ll act during the ceremony plus that may be a big ask for your friend... maybe talk to your friend & see if they were planning to get a sitter or if they were planning to bring the kids?

We have 1 ring bearer, my nephew who’s 5, and three flower girls, my two nieces 9 and about 1.5 and my FH’s niece who will also be about 1.5 years old. We aren’t sweating if the two youngest ones can’t get down the aisle with the older flower girl. Both of their parents are in the wedding party so they can help them. We’re also going to have a baby sitter ready to get the little ones when they’ve had enough of the evening lol. So that way all the parents can stay and enjoy themselves. Also- since the two youngest flowers girls Mom’s are bridesmaids, I’m having them come a little later in the morning to get ready than everyone else in hopes that the little ones get more sleep that morning. Or at least have a “normal” morning routine with their Moms. With kids that young you just have to hope for the best and wing it. We’ll also have a wagon for them for the aisle, but also not worried if they’d rather walk. They’ll be adorable either way 🥰

I was just reading this...and your question reminded me off it. Scroll down until you get to the flower girl/ring bearer. I think it would be absolutely adorable and would totally do it!!!!

https://www.google.com/amp/s/www.theknot.com/content/amphtml/wedding-traditions-you-can-skip

We chose our 3 nieces to be the flower girls and our 1 nephew to be the ring bearer. Kids are cute no matter how few or how many it will work.