Guerlain released Petit Guerlain in 1994. It is usually attributed to Jean Paul Guerlain; Olivia Giacobetti said in an interview some time ago that she worked on it as well. The notes are citrus, lavender, camomile, violet leaf, mimosa, rose, jasmine and vanilla. The top notes are a bit sharp, but it quickly softens to a sheer, delicate floral with a subdued Guerlinade base. It would be perfectly appropriate on a young girl, but there is nothing particularly childish about it — an adult who preferred something very soft and quiet could easily wear it. It is an Eau de Toilette, and the lasting power is good. I think it used to come in an alcohol-free version, but I no longer see that listed on the Guerlain website.
Petit Ange is by Parfums de Nicolaï, and has notes of tangerine and lilac. It starts with lightly sweet citrus, then takes on the candied smell of black licorice. Hints of citrus and licorice remain as it fades into a soft lilac with a dusting of powder. It is a bit less conventional than the Petit Guerlain; but it is an Eau Fraiche and somewhat shorter lived. I wear it once in awhile and find it refreshing on a hot day, but I've never been tempted to buy a full bottle. I think I have read that it is alcohol-free but I cannot find confirmation on the Parfums de Nicolaï website.
Both of these are nicely done. Either would be a perfect introduction to perfume for a small girl, although I would not be surprised if your average modern girl would prefer a bottle of the latest Barbie scent or perhaps the Mary Kate and Ashley duo.