Options for a third date?

I'm seeing a guy and so far we've been on two dates. The first was to baskin robbins and the second to sizzler's. He treated me both times and on our third date I want to treat him. Any ideas? I was thinking picnic, but is that too soon? And I don't have a clue as to what include anyway. Lol. What are some cool third date options that would appeal to a guy? He doesn't do movies atleast not in theatre.