I've watched it 12y ago but can't remember the name.
It goes something like this:
Two little kids were playing around in the house.
By accident, they find a secret passage in the cupboard to another world.
It's something like magic, I'm not sure.
There, they grow up and become kings or something like that.
One day they decide to go back into their real world.
After they go back through the cupboard again, they transform from grown up men to little kids again.
The first time they went through cupboard, their mothers were drinking coffee and now when they're back, their mothers are still drinking coffee.
It's like they never left but in that magic world, they've spent their life time.
Anybody knows from what movie I'm talikng about.