My son asked for an Xbox one and Minecraft for Christmas, but now he found out that his friends will be playing the game on Xbox 360. Will he be able to play with them? Thanks.
According to the Microsoft support site you can't.
Minecraft: Xbox 360 Edition can only be played with other Xbox 360 consoles on Xbox Live, and the Xbox One edition can only be played online with other Xbox One consoles. There is no cross-platform play with the other editions of Minecraft.