Nordic Berries Multivitamin
Kids love these. They're the highest quality gummy vitamin that I've found.

Emergen-C
Effervescent multivitamin powder, tastes like a healthy version of Tang. Heavily loaded with vitamin C. I like Orange, but there are other flavors available.

KAL Nutritional Yeast Flakes
A superfood which provides a nearly complete set of B Vitamins and amino acids in a highly usable form. Can use as a replacement for parmesan cheese (it has a savory flavor). Also available in tablet form.

Cod Liver and other Fish Oils
I recommend Carlsons, Nordic Naturals, and Vital Nutrients Varieties. We have some of the Vital Nutrients variety for sale in the office.

Probiotics
Klaire Labs is the highest quality I've found. I now offer these for sale in the office.   Jarro-Dophilus (for babies) (for older children/adults) is acceptable as well though it does contain casein.  

Immune Enhancement
I recommend either Sambuguard or Esberitox.

Vitamin D
Carlsons drops or capsules.