I'm counting just the kids searching by themselves and they can't just look at it...they actually have to wander there.

No parents...so LBT 5 wouldn't count.

Since this actually is even confusing me, I'll just lay down the answer:
LBT 2- going after Ozzie and Strut
LBT 3- finding water
LBT 4- had to go through it to get the the Land of Mists
LBT 6- depends if you think Saurus Rock is in the Mysterious Beyond (I don't think it is)
LBT 7- same as LBT 6
LBT 9- probably had to through part of it to find a way to the Big Water
I count five times.