My son is having his 5th birthday at a soft play. Venue says to bring own food. Was planning on getting loads of platters from costco - they do great wrap and sandwich platters. Obviously crisps, sausage rolls, cake etc. Planning to do a big buffet. But given that this is quite late in the day, would guests (parents really) expect something more substantial? Would sandwiches etc be okay, or would hot food be expected? There will be around 30-40 kids there i expect (exclusive soft play hire). Thanks!