The free annual YMCA Healthy Kids Day at the YMCA’s Camp Erdman (69-385 Farrington Highway) camp lets kids get some exercise while having a lot of fun. There is a ropes course, a giant swing, a rock-climbing wall, obstacle courses and a pool. It’s totally worth the drive to the north shore for free access to the ropes course alone! Plus, there will be crafts, games and food for purchase. April 14. 10 a.m. to 3 p.m. ymcahonolulu.org