In this adventure, your parents checked the mail and gave you an invitation to spend the summer with the Tennyson family during the summer and you accept the invitation because it's going to be in the Ben 10 universe and partly a Ben 10 omniverse flashback.

Little did you know that not only Ben gets his omnitrix but you the user get one as well, crazy right?

You'll have fun with this adventure good luck!

I also Ben and Gwen are 10 years old