I use coffee filters on alot of projects... my guys are shredders and love coffee filters. String up coffee filters on some butcher twin, hang on cage. Give a roll of clean tp paper, hang in cage. Give a roll of adding machine paper, hang in cage.
I cut, sand, dye and drill my own wood for toys. Thin pieces of pine are a big hit, and for the parrotlet I purchased thin cuts of balsa.
Cut a dowel into a 6 inch piece. Drill holes all the way through, to make about 4 complete holes in the dowel. To one end add a SS hanger. Run veggie tanned leather through the holes- string with 4 beads on each end- you will have 8 ends. Tie. This is a favorite.

Found these at walmart- they are small dog toys. Hang with leather strap, tie in cage. Perfect swing/chewing toy

Foot toys- pine shapes, drilled and leather tied securly to entice beaking. 2 dice drilled and tied together with leather

A wooden spoon. Tied with butcher twine for preening. Marbella beads put over the handle for playing

Dowel drilled 3 times as base. Rope used to string- baby blocks, marbella beads, pine cuts and rawhide squares.