Large indoor play area for kids in Sofia, Capella Play offers ballparks, slides, swings, mini football and plenty of space for running around. The whole place is manned by assistants who walk around inside the play areas so you need not worry about your child. If you enjoy this kind of mayhem you can sit in the cafe/restaurant alongside and observe your children, though you may prefer to leave them there for a couple of hours and go for some shopping therapy.