I can't get my husband more involved in caring for our kids, and I want his help. What can I do?

Parenting is a shared responsibility. Husbands shouldn't leave child-rearing solely to their wives. You may want to phrase it in this manner: "Dear, I feel overwhelmed taking care of the kids alone. I would love it if you could help to change diapers/feed/bathe the children". If all else fails, do try couples' counselling. http://sg.theasianparent.com/5-ways-to-communicate-better-with-your-spouse/