DS's birthday in a couple of weeks, on a Friday. He wants to invite 4 friends (2 boys, 2 girls) from school. Our house is tiny so more than that not really an option. We don't want to do a proper full on party, but we want them all to have fun and for it not to be too hectic. Have very little cash spare to spend on it. Any suggestions would be very welcome! Have thought maybe an age appropriate, reasonably complicated treasure hunt with good quality prizes? Easier said than done though! DS has also mentioned that he'd like a Lego theme... Would it be reasonable to just get all his lego out for them to play with? 