Why is Feux follets mentioned in this topic...

Sure, it is probably the prettiest but it is one of the hardest. Unless you actually play it allegretto...

Oh well.
#1 is obviously the easiest one to learn (very short and repeats)
#6 is not very technically challenging
#7 not hard but probably the most boring of the set
#8 show-off piece with a couple of hard parts. I find it's a good one to start the set... very fun to play. very straightforward.
#11 should not be underestimated and it's such a pretty one!