As a day home provider or a parent, what are your thoughts on the following for sleep arrangements??

1. Kids on different levels of a bi-level house. Obviously I can't be on both levels but if I would have a monitor on one level and keep checking on the kids.

2. Does anybody put kids to sleep in the play area whether it be in play pens, on mats, on couches, etc?

3. Would you put or feel comfortable with children sleeping in a room with exercise equipment (treadmill, weight bench?)