Defiance
Arlo is certainly hitting the defiant stage of development. In a rather gentle way, I have to admit - he's pretty even tempered, apart from the occasional fragile day (of which we've had a few this week, even in tandem with mad-and-dave's Lillian during their sleepover party here). But he definitely enjoys activities which he knows are discouraged.
Sometimes he will do something like pull out the fire tools and bang them on the floorboards, or, as he did five seconds ago, look at me over his shoulder while throwing his books across the room*, and then assume a Serious Face and say "Stop it! Don't do that!". Sigh.
* Of course, he is attention seeking right at this moment because I am on the "cyuper", which I very rarely do while he is awake. It is the number-one trigger of attention seeking behaviour so usually I restrict it to when he's in bed, but in this case we are waiting till we can call his dad so he just has to deal.
And now we have to stop for a cuggle because Arlo "bump his head, need cuggle a kiss".