looked like a fun day! I haven't been to the columbus zoo for a long time, I went with my kids to winter light festival several times.
Have you taken Misha to the Franklin Conservatory butterfly release? Every day the release hundreds of butterflies into the lovely glass structure. There is a monarch hatchery downstairs, too. For big kids, there are glass sculptures by Dale Chihuly installed all around the gardens. You can find the Franklin Conservatory on the web for info.