They should save the Longbottoms while they're at it. It would be cruel to still let that happen without at least trying to do something. Severus and Minerva should tell Dumbledore what will happen to them, at the very least.
I like your ideas and the story is cute, but I think Harry talks a bit much for a one year old.
Author's Response: They were so fixed on the Potters that they happened to forget about the Longbottoms... a pity, really.... I'm sorry ;-)
If Harry talks much - he is not just one, but one year and three months - my younger son (he is five now, his brother six) talked much more, not better but more at that age ;-)