The easiest way to the get the good stuff into my kids is via smoothies. Nut milks are a great way of balancing out the fruit and keeping their tummies full. Chia seeds will give them fibre, protein, omega 3 EFA’s, calcium, iron and magnesium. I have recently discovered the goodness of camu powder. It is a Peruvian super food which is rich in vitamin C and amino acids. You purchase it and many other super foods at http://www.iherb.com?rcode=ZNZ931.
Just be sure to make enough for yourself