Ok, so first, matilda takes place in SCP, wait, hold on, stick with me here, when matilda was born, she was a regular baby, but, remember that driving scene in the movie when matilda was in the back of the car and she was a baby, well if you recall, there were speedbumps
as you can see here, those aren't any Regular lines, those are speedbump lines, so when she was a baby in the back of the car, the car ran over the speedbumps, causing the car to shake, causing the baby/her to shake, causing, now say it with me here, her brain to shake, thats a key point, keep it in mind, now, remember the SCP correlation i talked about, well in scp, theres this little thing called thaumaturgy, thaumaturgy is basically magic, except to conduct it, you need to draw symbols on things, those symbols give the thing magical properties, for example, drawing 3 lines in the middle of a square on any inanimate object will make it indestructible. so, when matildas baby brain was being shaken by the speedbumps, the brain shook coincidentaly in a way that drew a magic symbol, which one you ask, well i think its a thaumaturgic symbol that when put on any object, will cause that object to become bigger, because it was (accidentaly) applied to matildas brain, it made her super smart, so super smart it also gave her
Telekenises