As 2 previous posters said, the Naval Park is good, so is the Bird Island breakwall. Go to the other side of the island by crossing the Int'l RR bridge. Also the Miss Buffalo.
I think better than most of the above though, except N Falls, is Holland Speedway. Don't knock it until you've gone there. Very family oriented, some amusement rides, special pricing for families, good food, and good entertainment. Go to the pits afterwards and meet drivers and get some freebies. Anything from real give-aways, to something a kid will really treasure. WRECKED CAR PARTS. When my kids were smaller, they brought home things from tires and driveshafts, to even a front clip
Holland