How can I make a homemade…….for my parakeet?

I am kinda on a budget and I heard that birds need a play pen or play gym kinda thing. I wanted to know how I can make one of those.

This site has a lot of ideas:

http://www.birdsnways.com/birds/igyms.htm

Homemade Cockatiel Play gym

Aecageco The Wiffler Birds Play Toy $12.99 This is one toy that will smil back at your bird. Has wooden blocks, plastic beads, and a wiffle ball. Easily clips to the top of the bird cage…