Hello!! My name is ... and I would like to invite you to my super costume party!!
I'm born the (date d'anniv) and I would love it if you could attend this party. Of course, seeing how it is a costume party, you have to be wearing a costume... The party will be in (adresse) and they will be many activities, specifically 4 activities to have fun on such a special day. We will be playing darts (fleches), 8 ball pool (billard),a dance contest and a treasure quest that will take placeat the end of the day. It would be wonderful if you could bring your brothers or sisters, the more we are, the more fun we have! I assure you, we'll be having a great time. So why not come?!
P-S : call the (numéro) for more info.