Ds2 just threw me a curve ball....HELP!

[Badvoc]

He has now decided that he in fact does want a big birthday party this year!
He will be 5 and has just started school so we are looking at 20+ kids.
I have managed to book the church hall and my sister is picking up invites, party bags etc for me as sainsburys have a sale on ATM.
It will need to be an old school party...I.e. party games like musical chairs etc and there will be boys and girls there.
I am planning on normal party food...sandwiches, pizza, veg sticks, jelly, cake etc...
HELP ME!!!!

IIWY I would

-set up a table with colouring sheets for quieter children

• clear big space to run round for over excited children
• rope in as many adults as you can to help, even better if you can get a teen to organise the games as they are more likely to listen to them
• have twice as many games as you think you will need just in case