Max finally found the courage to explore the box I put in his cage. It's been in the cage 2 days and he'd pretty much keep an eagle eye on it but wouldn't go near it. I had even put in some of his foot toys and nutriberries, but nothing. I put the box back in his cage empty (washing the toys) after cleaning cages. Had to run a quick errand so put the fids up without putting the toys and treats back in the box. This is what I found a few minutes later when I got home. It's a Max in a Box