We have health things going on and the kids get lots of supps. Before they could swallow pills (which for my son happened around 3.5yo), I'd open a capsule and either mix it into juice, or hide it in between layers of applesauce, just one bite off a spoon.
Thorne is a brand available lots of places online, the forms of vitamins and minerals are generally quite bioavailable, and they have real folate instead of folic acid, which is very important for some people. They have a kids' multivit in very small capsules, and either those could be opened and hidden in an applesauce bite, or an adult multivit could be used--since the adult Basic Nutrients are 6 capsules per dosage listed on the website, that would be easy to scale down. With such a small dose, that's pretty cost effective.