You were camping with your grandmother and your younger cousin, who normally treats you like a small and immature child, since that's really how you are

The whole summer passed normally, you living with your grandfather and cousin until a meteorite fell near the mobile home where you and your cousin and grandfather were staying

So you quickly decided to explore, realizing that it was a kind of capsule from which a watch came out and stuck to your hand

At first you thought it was cool, but then you realized it was cooler, because you could turn into aliens at will, with the small limitation of the duration of the transformations

Right now you are sitting on the couch in the camper while your cousin Gwen comes to scold you again