A cute little thank you gift is a nice gesture to give the flower girl as a lasting memory of her being part of the wedding. Including the flower girl in the wedding photos is also a very cute addition, but it is not recommended to take them along on photo shoots as after all, they are young children and may get bored or require some more attention. Photos of the flower girl with the ring bearer can be absolutely adorable.
Flower girls often will walk to quickly, so be sure to let them know that they will be photographed, (if they like that sort of thing) if they move slower for more people to smile and enjoy their presence. Once she has walked down the aisle, it is best for her to go and sit with her parents. As she is just a young girl, her focus and attention span will likely not last the duration of the of the wedding ceremony so it is best that she is not expected to stand up as part of the wedding party.
Prior to her walking down the aisle she will also need to be looked after and advised on when she should start her walk. If one of her parents is in the wedding party, they can look after her and the ring bearer if you have one, as the bride and her father will other things to worry about, so they might be the best people to ensure the flower girl is behaving and all prepared. If a parent is not in the wedding party the Maid of honor, or whoever are the last people to walk out before the bride, might be the best person to keep an eye on them. If nothing else is working out, a parent can always wait outside with the flower girl until it is her turn to walk down the aisle and slip in on their once the bride has down her walk. If this is the case, just make sure you don’t accidentally end up in any of the photos of the bride walking down the aisle. This may also mean that they (the parent) might miss some of the ceremony as a result of waiting outside for a good opportunity to walk in to the ceremony.
Flower girls can often lighten the mood during the ceremony. As they are quite young they can often do some typically lighthearted childish type things that bring about a good laugh for all wedding guests and others in the wedding party.
It is always a good idea to check the venue of your wedding ceremony to see if tossing flowers on the floor is okay. Some place might not like that or will have to ensure that there is someone there to clean it up afterwards.