I guess now is as good a time as any for an update.
I bought a Remington 870 12 for the wife and single shot 20 for the daughter. For the 12 I got a TruGlow turkey choke and sights and bought a variety of turkey loads. Best load is putting 15 pellets in the kill zone at 40 yards.
20 gauge is limited to about 30 yards but that should be fine for the 12 year old. She has a hard time hitting where she needs to beyond 30 anyway.