Overrun, I don't know how to say this so I don't come over all overpowering and demanding
Will it be in your house? If so,
D O N 'T D O I T!!!!!!
Either limit the numbers or pay to hold it in a church hall or soft play place. OR make sure every child has one adult with him/her. We didn't have ours at home, we went to a local centre and it was tiring but very manageable and fun. At home you will be a headless chicken and your house will look like Iraq with balloons .
If you have no choice but to be at home, then think about things like allocating an adult at the toilet to supervise and make sure the kids know who that person is (i.e. if they need a wee they go to the person in the bright yellow t-shirt). Not a nice job for the adult but it saves kids needing a wee and interrupting you all the time. We did things like:
(1) have a massive tub or cardboard box for coats (and one for shoes), stash them away during the party and bring them out at the door at home time. Have another one for the presents so they are not tempted to open them during the party.
(2) give out party bags at the door once the coats and shoes are on
(3) don't serve ice cream, it takes ages to trowel out (while they get bored, make a mess and walk about with food) and lots of kids don't eat it, makes everything small and buffet style in front of them so they can pack their faces and move on quickly.
(4) assign an area for left over food and dishes and have black bags at the ready to chuck all the slop into
(5) have a basin of soapy water and a cloth ready before they start eating - something will get spilled or spat out within about 20 seconds
(6) make sure each adult knows his/her job. Don't be scared of sounding bossy, kids respond well to being told what to do next as long as you are fun with it ("go and ask the lady in the red top to wipe your hands or I'll have to lick them" usually works )
Kelly, thats brilliant about nursery for your DTs. It will be really good for them. I have one that goes in happily and one that cries and clings on to me. I figure the happy one wouldn't be happy if it was a hellish place to be. I agree with rav about aprons clothes are much softer to wipe your hands on.