My boys (almost 5 and 2 1/2) take Blue Ice Cod Liver Oil - we get the mint flavor and they eagerly take it. They also get a Source Natural's Mega-Kid multi almost each day (it averages about 5 times a week). In the morning I tend to spike their juice with half a capsule of probiotic powder, and sometimes also spike it with some sodium ascorbate (vit C).