Sausages (not sure where you're getting your shop from but sainsbury's do cocktail sausags you can cook yourself) ham sandwiches (I took off the crusts and cut them into 6 tiny sandwiches) cheese sanwiches cheese footballs twigletts cherry tomatoes cucumber sticks
then plates of cookies, strawberries and grapes.
for adults I did pizza express dough balls which went down really well.
Best thing is to keep it simple, and do multiple plates of the same thing rather than lots of different plates. Keeps the shopping easier too
Sandwitches, cut into little triangles or squares. I like to do chess board patterns by alternating brown and white bread (each sandwitch is made with white on one side and brown on the other) A few big platters of these will do.
slices of salami and other cold meats
chunks of cheese (edan goes down well for its mild taste)
bowls of crisps, hoola hoops and twiglets seem popular.
Little cupcakes or biscuits or tarts.
Don't try doing too many different things, think one main carbohydrate (sandwithes or pizza), some savoury snacks, some fruit and veg and some sweet snacks and fruit.
Diluted juice to drink. Just have one type on offer (unless anyone has allergies etc.)