In addition to mini-golf, we did a hike on Memorial Day. We parked at the Nix Nature Center in Laguna Canyon ($3 parking). The kids were so whiny that John got sick of it and went back to the car.
We made it to the top and took a quick picture before plodding the mile back. So we didn't do the full loop. The first 1/2 mile or so is so flat that you could easily bring a stroller and a picnic, which some other visitors had done. We saw a white crane, a lizard and some little ducks.
According to Nike+, this was my fastest mile ever at 30 minutes. The kids walked the whole two miles, and came out of it with 2 days of no treats and no iPad, and a promise that Dalton doesn't get to go on the next hike. Also, no more treats or snacks on hikes, since we bring them to quell the whining, and it obviously doesn't work.