Continuity mistake: Near the end of the movie, Barney walks out of a huge pile of hay. He shakes and brushes all of the hay off, but a few seconds later he has a bunch of hay on the top of his head again. (01:03:10)
Continuity mistake: In the marching band scene they all have long shadows, and then suddenly they have no shadows at all.
Continuity mistake: In the beginning, when the kids are riding to their grandparents', at first their father is driving the car. After passing the Apple Day Festival, their mother is suddenly driving.
Other mistake: When Cody stole Barney and was running from Abigail and Marcella he hid in the closet, but the girls thought he went to the attic. When he came out of the closet the door made a creaking noise. If the noise was made when he went in, then the girls would have known he was in the closet rather than thinking he went to the attic.
Visible crew/equipment: Several times during the "we're going to find a way" musical number the ankle part of the barney costume lifts up showing that the feet are separate from the rest of the costume and showing the ankle of the man inside the Barney costume it is most noticeable when Barney takes Marcella's hand and she steps on the platform.
Revealing mistake: When Baby Bop runs into the frame in the barn to ask if anyone has seen her blankie, part of her hair falls off.
Visible crew/equipment: When singing Old MacDonald the sheep handler can be seen trying to herd the sheep in the lower right hand corner of the scene.
Answer: To show the strength of their friendship and show how much they loved each other, which is what that whole song was about.