Need help with party food!

Hi everyone, i'm planning a little get together for my son's birthday. There will be about 8 or so 2-3 year olds, plus their parents and my son's grandparents. So about 20 adults potentially. Several of the families also have small babies so needs to be finger food really so they're not struggling with plates and forks as well as babies. Also needs to be things that are ok eaten cold. 

I'm planning to do sandwiches, pizza, crisps, sausage rolls, tomatoes, cucumber, fruit and some biscuits/little cakes for the children but am keen not to have to make hundreds of sandwiches for the adults too. 

I was thinking of doing a kind of grazing table for them with cheese, crackers, nuts, dried fruits, cold meats, breads, olives and other antipasti type sides like roasted peppers, sundried tomatoes, pickles, crudites and dips, etc. Does that sound a bit over the top for a 3 year old's birthday though? Would you want to eat that? 

Thanks for any help!