Here's Sid solving a case about a snowman by the way.

That second photo is amazingly cute.

I have this headcanon that while Sherlock picks locks while thinking, Sid cracks open walnuts, after testing to see which ones are the good ones. Sherlock always offers the bowl of nuts to whoever is around.

"I've solved the case!" *throws down a bowl of nuts* "Feel free to partake while I explain."