I am just starting the no 'poo experiment on myself...going to be an uncomfortable few weeks methinks

. My twenty-one month old son is pretty much no 'poo as he used to put up such a fight if we tried to wash his hair

. His hair looks great though, I don't bother trying to wash it nowadays, unless he has been in chlorinated water.
I would be cautious about using essential oils on your toddler's skin, they are very concentrated and some oils, such as citrus, can make skin photo-sensitive.