DD will be 3 this summer and I need inspiration for what to do for her birthday party. I was thinking of hiring a bouncy castle for day for the garden, chucking a paddling pool in the garden too and inviting 8-10 of her little similar-aged buddies. And doing some sort of kids picnic. Does that suffice? Do we need to hire a children's entertainer? Do we need to do food for parents too (beers and bbq?). TIA 