How to put flowers in hair?

The mom of a five year old girl I babysit asked me to do her daughter's hair for a wedding, the kiddie's going to be the flower girl. She has gorgeous dark brown curly hair that reaches her lower-back. Now, the bride wants her to have a tiara and some very small flowers all over her updone hair. I know what to do what the tiara, and have a pretty good idea about the updo, but how do I fix all those little flowers in the hair without it being obvious or falling everywhere after one hour? Any tips?

Since this thread was originally posted over a month ago, I may be too late in replying. But if the wedding hasn't happened yet, I'll put my 2 cents worth in. My daughter was a flower girl in a wedding and we used small flowers to adorn her hairstyle. I got these really tiny flowers (1/2 or less in width) at Walmart. They can be found in the craft section and they come in a packet of 10 -15 I think. They have wire stems attached so it's really easy to insert them into a hairstyle. Then you can bend the wire so that the flower stays in place and is hidden under the hair somehow. They didn't tear or damage her hair either and were very easy to remove later.

Hope this helps.
Caramia