At night, when I'm too tired to play, I let them play "hunting for kibble" and hide kibble around the living room. It's a hoot to watch them sniffing like crazy, while I relax on the couch!
It's fun to watch them develop their sense of smell too. Scottie already knew how (because I played this with him before Casie came along), so at first he'd find most of it. Then Casie quickly caught on because she realized she was missing out! They're both on par now. hehe...
After the little game, they're all ready for bed Zzzz...