Party food for 30 9/10 year olds, how much

[cupcakeicing]

Ds is having a 10th birthday party soon for 30 guests. What food do you recomnend and in what quantities?

Pizza & chips

What time of day is it?
2-5 means snack foods to me, over lunch or tea time means a meal-so pizza or pasta.
Will they be sitting down at a table to eat?
trying to ignore the horror of 30 10 year olds

In ds's age group (turning 8), sausage in a bun plus crisps, biscuits, fairy cakes are v popular, as is pizza. Quantity will depend on timings - 2 or 3 slices of pizza each if eating at 5, one sausage in bun each with some spare sausages for the ravenous