Birthday picnic ideas

I have a 10 month old son, and my birthday is this weekend. I’d really like to have a picnic with him but I’m not sure what kind of foods I should prepare? Any ideas? It’d likely be before/after a visit to the pumpkin patch, as that’s my favorite place this time of year. Nothing that has to be cooked or reheated, but if it can be cooked and then eaten cold/roomtemp then I’m all ears!