Firstborn has no shortage of toys. Oh, he doesn't get everything he wants - but if he really wants something, he can usually get it. Despite this, he occasionally decides to make his own, apparently for the sheer love of creation. Mostly, I do my best to encourage this... though I will confess to a faint bit of exasperation on the day I came home to find my bed completely buried in paper airplanes.
Last night, though, he surprised me. He's built things with Trio blocks before (including, on one memorable occasion, a facehugger Xenomorph and a Halflife Head Crab). And he's built toy pistols out of Trio before, too. So I really shouldn't have been surprised that he'd come up with another one, and I wasn't - except that this one, unlike its predecessors, actually shoots.
It's a hand cannon.
What he's done, basically, is take the little cannon from one of the castle playsets, and mount it on a pistol grip. So he has to press a button out at the end of the barrel in order to fire, but it actually does launch the little cannonball on the end.
From the front...
He'd been making an axe. And a shield. Out of paper.