Birthday picnic ideas?

Myra

I asked him where he wanted to go out to eat for his birthday and he said he just wanted to do a picnic and I have never been the one to plan a picnic and only did it once before (not with him). I figured I can plan it but I wasn’t sure what exactly to get or where to start lol. He is a very simple person so I know he wouldn’t like elaborate stuff but what do I need to know? Please help lol!