Based off of a doodle I did at work. Tati explains, in her own terms, how the TARDIS works.

"It's like...you know. It's like MAGIC~!"
"It's not magic."
"I said it's like, not is."

Have I mentioned that I looooove drawing these two? And not only that, but I love drawing them as chibis. Well, here's the formula for success:

Ponytail + Crazy hair + Wacky hijinks = WHEE!