Definition default Room Capacity: The default amount mirrors the number of mattresses in the room (NOT sofa beds!). The total default must be the sum of the number of Adults plus Children. An example for a room with a maximum capacity of 4 would be, 4 maximum adults and 3 maximum children. 

Therefore, if a booking is requested with 4 kids, this product will not appear. Nevertheless, if booking is requested with 1 adult and 3 children, then this product will be available.