My cousins may come from Texas and they've barley seen snow!!!?

Hey. So my cousins may come from Texas and theyve barley seen now. if they come they will come for about 10 days. I live in Indiana and i was wondering if it will snow within 10 in late December and really really early january ( they mite come from dec.23 till Jan.3) will it snow?? if so i know that i want to take them sledding and we will jump on my trapoline since it will ave snow on it. Oh and we will have snowball fights and stuff like that. What other stuff should we do. They are both girls and so am i and one of them are 8 and the other is the same age as me...12. So will it snow and if it does what should we do?? plez help