Soccer Decorations

what affordable but cute and sweet decorations could i use to surprise by bf with a bday/coming home party?

ive been away from home for a couple of months now. next week, ill finally be able to go back in time for my boyfriend's bday. i would really like to surprise him with a simple party that includes his family. what decorations and props could we use to make sure he'll really be confused when he enters his house? balloons are out of the question since that was already used for a previous occassion. (he's about to cross to being an adult, btw, so 'kiddy' designs are welcome. itll be like a sendoff to adulthood.) he likes guitars and soccer and multi media arts.

lots of streamers, balloons, birthday banners, etc go long way if used right and they are the cheapest stuff available.

Let's Not Fight This Christmas - Chris Difford and the Decorations