I think the Amana is considered a beefsteak tomato since it's so large?? This is my first year growing it, so I will let you know how the flavor is and save seeds if it's a good one!
Yes, we've been eating the yummy Stupice that have been fruiting quite a bit and a small one called White Currant that we have every year ~ it's small but full of flavor & produces well... love that one!! Have you tried it? It's tangy on the inside and the skin is sweet, great poppers!
It sounds like your son is learning what good food is! That's great!