The toddler figures it out
As it turns out, all this button pushing and knob turning, door opening and such that Lynxton has been doing and scaring us half to death with and driving us crazy - it's just been his effort to figure things out. Now he's got the microwave figured out, he knows that you open the door, put in an item of food, press a few buttons from the upper panel, then press the lone button on the second to lowest panel, the microwave comes on, makes noise, starts turning inside, you step aside, patiently wait until it dings, then you press the great big button at the very bottom. The door pops open and grandma or grandpa takes out the food item. Then you close the door. In fact just before he closes door, he says "Doh da do!" - "Close the door!"
I never wanted to be a man called "grandpa!" because I never wanted to acknowledge that the process of growing old applies to me. Now, sometimes, I feel like I could enjoy being a full-time grandpa. I still don't want to acknowledge that the process of growing old applies to me, though. Somehow, having young people in your life kind of keeps you feeling young - when you're not too exhausted to feel anything but exhausted.