Texting a girl spontaneously?

Okay, well I like this girl, and we've been texting awhile and I have found a way to keep things interesting by just asking random questions.. but now we're not hanging out in person for another couple days and I need to know how to keep her interested for the next couple days. Any ideas on how I can be spontaneous while texting, because I don't wanna be like most guys. I wanna be different. Any ideas would be appreciated. Thanks.