I am planning my son's 1st B'day party at home, pls guide me on cooking so that there is less work for the day

It is my son's 1st B'day on 2nd of July. Since there will be adults and children both I have decided on the following items, like Burgers, French Fries, Samber Idly & Vadas, Manchurian, Chowmein, Pau Bhaji and Mini Pizzas.