The easiest way is to make a smoothie and add the flaxoil to it. My favorite recipe is to crush about a cup of ice in blender with an ice-crush feature, add 1 scoop of a good quality whey protein (vanilla or chocolate) 1 cup of frozen fruit, (banana's my fave) a tbsp of flaxoil and enough cold water for it all to mix (about 1/2 - 1 cup cold water). It comes out like a thick milk shake.
Get a 8-10 serving popsicle tray and pour the smoothie in it and stick popsicle sticks in the centers and place in freezer untill they freeze, to make some smoothie pops.
These make a great treat.
You can add yogurt to the smoothie, frozen berries, peaches, pears, apples or whatever fruit your child likes best. The frozen fruit helps to make it thicker.
It takes 9 - 1000mg capsules to equal 1 tbsp of the flaxoil and they are very large gel capsules, probably too big for a child to swallow.
You can add flaxoil to cooked cereal but don't use it to cook in a recipe, as it turns rancid.