The Penn-Plax Wood Bird Play Pen is a fully-loaded activity center to keep birds active. Place this bird play area on top of the cage to give birds a change of scenery, or use in another room where your bird can keep you company. It is lightweight and portable, and features rope perches, ladders, swings, bells and bird toys. Playpens have more bird perches and ladders as they get bigger. 9 in. x 9 in. x 8.25 in.