Like others have mentioned, start very small. A 410 is more suited for, a lot older. Most of the family has started around 3-4 years old on bb or pellet, then into a custom single shot youth .22 at age 4-5 years old.

My 10 y/o has tried a .243 and 6.5 Grendel with reduced loads, both still give to much oomph for her to handle. Work up slowly!!