Albert has two stripes across his face. One of them is black. The other one starts out as yellow. A short while into the episode it turns to orange. Towards the end of the episode it turns back to yellow.
It is highly unlike a boy Albert's age would be driving a Four-Up, two pairs of horses, when most adult men have difficulty doing it.
You can see two sets of reins when Albert is driving the wagon. One set Albert has. The other goes into the wagon.
The end music is Hava Nagila, an Israeli folk song.
While "Chief Kilowatt" was in Albert's dream, it's highly unlikely Albert would be familiar with the term: it was first adopted by the British Association for the Advancement of Science in 1882, less than a decade before the approximate date in which the episode took place, and rural electrification in Minnesota only begun in 1925.
At around 23:00 minutes when Albert and Laura are riding with the other "Indian chiefs", you can clearly see the tire tracks in the dust from the picture car ahead of them.