hey here's a bird toy idea =) my dad had one of those post-office tube things and drilled some holes in the top creating a new, um, toy for my gcc. She absolutely loves running back and forth through the tube and sticking her head out of the top. Of course I have no idea how other birds/species would react to it but it was a success for me. Also it may not be a good idea for hormonal birds?
here are some photos so you can see what it looks like...