It’s the Balsa and Cork Double Stack from A Bird Toy.
This toy is really big. By cutting it in half, I was able to put one half in with the girls and one half with the boys. It wasn’t long before the girls started nibbling. The top balsa block was almost gone an hour later.
Cooper’s friends Kelle and John bought the birds this toy as a gift. We have it next to a perch on the outside of the cage. The birds enjoy talking and singing to it so much we bought one for Sido and now another one for the inside of the cage. Here is Felix mid-chatter.