Continuity mistake: When Lin lifts the rocks around the house in the final scene, there are eleven of them. But in the last shot, there are only eight rocks.
Fruit Picking Day/Daniel Is Big Enough to Help Dad - S1-E11
Continuity mistake: The fruit on Miss Elaina's hat changes colors.
Continuity mistake: When Larry Bird hands Marty the pie, Marty takes it with one hand and then grabs it with his other hand. In the next shot, the pie is no longer in his hands and he's seen grabbing it with both hands at once.