We usually have quite a few kids at DS' party. I wouldn't know how to keep them occupied without one! It certainly keeps them happy. The only consideration is wet weather and if you lose your deposit if it down pours. It happened to us this year and we went ahead, luckily it cleared up and the kids could use it even if it was a little cold. I still did party games like pass the parcel and musical statues but that was all we needed as we then cut the cake and had food. Have a great party