We hope you don't mind us replying in English. All members of a Premium for Family plan must reside at the same physical address as the owner, but we understand that circumstances can vary. You can upgrade and invite your children to the family plan if they live with you half the time, just make sure that they enter your address when they join the plan.
You can find more info about Premium for Family here. We also suggest that you make sure your children each have their own account before upgrading. If they don't have one, they can create one at spotify.com/signup.