No, preference of hand or foot does not matter in snowboarding as far as which board to purchase. They will all accommodate a child that is either left or right-handed. When they use the board is when it matters. Just like a skateboard that is used on concrete or pavement, the stronger foot will go on the back of the board and the weaker foot goes on the front. The back foot does the steering and the pushing, as with a skateboard too. Let your child place the board as they feel the most comfortable because even if the child prefers one hand over the other, this may not be the same for the feet. They should choose whichever way is more comfortable.