I run I jump I am one of four you find me hanging around your door

HELP does not identify the School Subject and you are likely to have no read it. Besides, WHAT is the question?

Guessing it is English and punctuation, here:

I run, I jump, I am one of four. You find me hanging around your door.

If it's a riddle? How about 4 children on Hallowe'en evening?

Sra (aka Mme)