Help me girls i need you're help she is 16 and i'm 18?

there is this girl who's from England she's 16 and her sister is 13 they both came to spend their holidays with me and my cousin. And the girl who's 16 is very beautifull and she sais that if she likes it here she will come back for summer next time. So i want to know what kind of stuff i should do so she want's to at least keep in touch with me when she goes back to England. we are in Texas and it's really boring here, she looks bored everyday and she is always on the computer or at the pool with her sister and then she goes back home, we don't have a car and we need one to go to the Mall etc...and our house is small ,it's very very hot outside ,we tought of playing monopoly etc...but i really need your help to help me find what kind of stuff i should do with her so she's not bored and want's to come back next time..Texas is so boring that she only watches tv with her sister and that's it ...help me make her unbored and intrested in me? please help me girls i want to know???