Also love Coolgran's book exchange idea! DDs birthdays are June and September. We used to put up our very large frame tent in the back garden. Food was put on camping tables and we had paper cups and plates, so next to no washing up to do, and the birds ate the dropped crumbs. We organised a few games, then had the birthday cake, and let the kids have free play. They loved it! Yes, we did try soft-play and some other venues, but they were never as good. As for the elaborate and expensive parties one hears about now, they are the equivalent of a native american potlatch. They are not for the benefit of the children, but to show off to other parents, or in fear of what others will say.