Society of Baby Engineers?

I was doing household errands yesterday afternoon, and Ellie was playing happily in the office/guest room. We normally keep the door closed, but it was open because I kept going in and out. And since she seemed so content, I figured, why not? After leaving her alone for a few minutes, this is what I found:

Since she wasn't hurting anything or anyone, and the laptop was off and unplugged, I let her go. I guess it should remind me that she is always watching and imitating...

Gramps will be proud!