Okay kiddo, do you like ice cream? Well, eisbock (milk) is a bit like ice cream but for grown-ups. Eisbock is actually a type of beer that's made by freezing it and removing some of the water to make it stronger and more concentrated. Milk is sometimes added to the process to make it creamier and smoother, just like ice cream!
So basically, eisbock (milk) is a really special and fancy beer that's made by freezing and adding milk to make it taste better. But remember, it's only for grown-ups because it's still beer and not something kids should have.