What Is SomeThing For A 12 Year Old & A 18 Year Old To Do Together?

I Am A 12 Year Old Girl & Tomorrow I Am Going To Hang OUt With My Cousins GirlFriend. The Only Problem Is That She's 18. We Hung Out Today For 2 Hours & She Is REALLY Cool! We've Got So Much Stuff In Common. Today We Went & Got Ice Cream Then Went To The Park & Talked. I Know There Is A Difference In Our Age But We Like The Same Kid & Teenager Things! Any Ideas Bout What We Could Do? I Would Like It If It Is A Pretty Lengthy List Too. Money Is Also Not A Deal. Thanks For Any Help!