The study supplements are (1) a micro-encapsulated powder containing a 1:1 ratio of the omega-3 fatty acid, docosahexaenoic acid (DHA) and the omega-6 fatty acid, arachidonic acid (ARA) from algal and fungal sources, respectively; and (2) a micro-encapsulated powder containing corn oil placebo. Two foil-packets containing either active intervention or placebo will provide 200mg DHA and 200mg ARA or 400 mg placebo oil per day to the toddler. Two packets of the powders will be added each day to a selection of recommended foods (e.g., yogurt). The duration of treatment will be from 12 to 24 months of age in Part A and in Part B will be from 24 to 36 months and followed to 42 months of age.