the only one i've been to had:
fairy bread
club sandwhiches (for the adults)
pizza cut into small bits
savouries & sausage rolls
rice crackers, chips, par boiled vege sticks (so not too crunchy) & dip & hummus
cheerios
cake which was lollycake about 3cm high and 3cm wide, shaped into a giant 1 iced with pink buttercream
and maybe a few other smaller things