I'm kind of weirdly bummed out and unmotivated, I thought a bit of kidfic would cheer me up.
The two structures couldn't have been more different if they'd tried. Sitting on the floor together in John's bedroom, John had built what appeared to be a spaceship of some sort, with no regard for brick colour. Sherlock, on the other hand, had meticulously reproduced a dopamine molecule and built a towering double-helix structure in red, blue, and grey. John peered at it.
"Deoxyribonucleic acid." Sherlock said proudly. John still just looked confused.
John's mother had let them play unsupervised with the Legos on the condition that they all get picked up at the end of the day, before Mycroft came to pick Sherlock up.
"Sherlock, can I put that on the shelf? So I don't hafta put it away?" John chewed on his lower lip, studying the spiral contraption.
"But what about your ship?"
"It's rubbish, I was just going to take it apart."
"Well, I think it's rather brilliant. In a sort of surrealist, postmodern way. Can I take it home with me? Just until next time?"
John grinned. Leave it to Sherlock to turn his shoddy attempt at a spaceship into some kind of artwork.
"Sure. Just don't forget to bring it back! We'll need those bricks next time."
"Boys, Sherlock's lift is here!" Startled, they made quick work of scooping up and putting away the remaining blocks.