Combine the coconut milk and agave in a large glass measuring cup with a spout. Add appropriate number of drops of the Vitamin D3 for 10 doses and stir.
Drain the orange slices and drop 5 or 6 slices into popsicle molds; do not fill. Pour the coconut milk over the orange slices, add popsicle sticks, and freeze for at least 4 hours or until solid.
Notes
Nutrition facts not calculated with vitamin D3, as this will vary based on the amount you use (dosage varies based on age of children this will serve).