What are your thoughts on play pens? I have twins recently 1year old and I think a play pen would be very hand when I'm home alone with them, for peace of mind of their safety and just to make things easier to manage. Again only when I'm home alone with them. But my mum thinks it's a horrible thing to do, my dad clearly not wanting to take sides stayed very diplomatic and tried to pretend to fall asleep. Am I wrong for wanting one?