Oh lord, I'd better get this right then.
I've decided that I'm going to not do paper plates etc but instead get plastic ones from IKEA. They come in a range of rainbow colours, are easier for little ones to use/carry, are reusable and cost 90p for 6 plates/bowls/cups which is way less than paper ones and I can use them again and again. I think we're going to have about 18 kids.
I'm going to get some fabric and make a load of rainbow bunting to match and probably a load of balloons too.
Cake will be rainbow layers to make a tall cake, frosted in white with either grey or colours elephants marching around the edge and a big 3 on the top. I've got a white cake stand to put it on and might even get a rainbow/red hat box to stand that on for extra height.
Food will just be snacks as I can only have the hall between mealtimes but I'm thinking bowls of rainbow fruits and some chocolate animal biscuits to go with the jungle themed inflatables. Not sure what else to do food-wise. I thought I'd just put the food on cheap, silver platters which I can bin afterwards. I'm thinking I'll decorate the table with a white tablecloth and some extra rainbow bunting. I might see if I can get rainbow napkins too.
I'm going to do a pass the parcel, potentially with each layer a different rainbow shade and put ??? in each player and an elephant-y type present in the middle.
I'll get the Jungle book/Tarzan soundtracks for music and we should be good to go.
Party bags will be white paper bags with elephants to match the cake. No idea what to put in them yet though. I might make some of those elephant blow outs I linked to earlier.
Then I'll stick the plates/bowls/cups/bunting in a box and send it up to you DW 