I gave my cats Talking buttons. For the past two months we've been giving them a few at a time to learn. It has been the most absolute fun. I initially got them so that they could tell me basic needs they want along with my dog instead of being destructive or climbing to get what they want. My cat, Raph, though, has been excelling at learning and using these buttons. 

The first buttons I gave were Hungry and Pets. Both were learned relatively fast for what meaning they had. We had some basic "I'm hungry! feed me" and "Give me pets!" After a while i noticed they were starting to use BOTH buttons to try to get playful attention, so We added in the button PLAY. AT this time we also gave Remo two buttons of "Thirsty" and "Outside" because the cats sometimes drink all his water in his bowl and he has a hard time informing us as he uses the same whine for EVERYTHING.

So, here we are with the newly installed "Play" button. I showed them the button, and then we got out some Cat Fishing rods when it was pressed. THE DAY OF Raph understood what that button meant. He stopped using the hungry and pets button for "I'm bored" and started clicking play. What was even more suprising is that he has been pressing the buttons for his siblings lately, too. XD He's supposed to let the others, but the other guys are kinda not as fast on the uptake and he started doing it himself. He's press "Play" and stare at Matty, so I'd get the toy out. WIggling in front of him, no response, go to matty and Matty just goes wild.

Conversation with Raph that happened when i saw he understood the Play button.
Raph: HUNGRY 
Me: You're not hungry, you're bored
Raph: PLAY! 
YES THAT's RIGHT, You're Bored!!!! Play raph! Play!