Last weekend I'd found an old foraging tower that Max used to use many years ago. I don't think I've even had it out in the 3+ years Stella's been with us. It was on the table, and there was a cashew in it, which (with my help), Max managed to dispense this morning.
Then, even though I hadn't replaced the cashew, which Max should have known since the toy is see-through, she started playing with the levers, hoping a nut might materialize. Of course this brought Stella over, and for quite some time, both of them were banging on different sides of the tower.