carmeny

Hi all, I got my 10 y.o. son the Plane and cargo Lego Technic set. He was surprised to see that the bags of bricks are not numbered in the order they should be used according to the instruction book. What do you think is the best way to approach this set? Is there a particular order by which he should open the bags or should he open all if them in one go and sort out the pieces by different types?? Thanks for your help Lego people! :-)