Fifth birthday parties are the worst. The kids have just started school, so don't have a fixed group of friends, so you end up inviting the whole class. So you go to 20+ of these bloody parties in a year.
For those who haven't got there yet, take my advice and book a kid's entertainer. A good one is well worth the cost. For our oldest, we thought we could manage with just us, but it was a struggle even with the help of my mum, who was a primary headteacher. Of course, I didn't help matters by turning up halfway through dressed as Batman. I naively believed the children would keep an awestruck respectful distance, but instead they swarmed all over me like ants on a jam sandwich. Mind you, you should have seen the fear in my son's eyes when I had to give him a talking to, still dressed as Batman. He didn't know what to think.