It's All His Fault!

What happens when a young James and Albus Potter get their hands on a malfunctioning time turner that used to be their aunt's? They end up in a war torn world the summer before their father's 5th year, with their little sister and their godbrother Teddy, that's what. Can Teddy control the outpoken, mischeivous Potter kids well enough to keep the future from beign altered? *AU*