Whether you and your baby are moving from room to room or city to city, a portable bed or playard, known as a play pen when we occupied one, is an easily transportable, safe dwelling for your little one to rest and play in. New models do triple duty with detachable bassinets, changing tables, diaper organizers and entertainment centers adorned with toys, music and blinking lights. Designed for tots from birth until about 2 years of age, most portable beds and playards feature mesh sides for good ventilation and easy viewing of their little occupants. Models intended for travel include a carrying case and are lightweight, compact and easy to fold and unfold. Read on to see what other parents have to report about these mini on-the-go nurseries.