Bless you! An American Father & I have two kids . . . girl 16 and boy 14 . . . your Mam has taken on a tall order, the girl is a terrible tomboy and prankster and the boy is wild as a buck, he could wreck a junkyard with a rubber hammer. :-D
Piece of cake. My Mam had two of us (similar descriptions as you gave)..just reverse the sexes.
We turned out okay. My brother is an accountant, and I'm a journalist.