I'm not sure how old your daughter is, but some of the steel pistols on the market weigh as much as a larger counterpart.
The MKIII Ruger weighs in at about 42 oz. An older child may have an easier time with it, but not a younger one. The 22/45 or even the aluminum upper version would be better for a shooter under say 10 years old. Ruger pistols are easily upgradeable for triggers, sights, and whatnot. They also come with rails and mounting screws for an electronic site if you want to go that route.
An enlightened zeal for the energy and efficiency of government will be stigmatized as the offspring of a temper fond of despotic power and hostile to the principles of liberty.
Alexander Hamilton, author of Federalist No. 1. 10/27/1787