The family rooms are huge ( well ours was). My youngest, aged 10, slept on the sofa bed and he didn't have any problems sleeping.
Only thing was that it was next to the radiator and he kept turning it down !!
Hi staying in the Iglika chalets, didn't realise they did family rooms in the hotel! We are going on the 10th March from Birmingham so will see you there no doubt. We have our two girls with us who are 3 and 5!