Billu is sitting on the banks of the river, while talking to his friend. Billu gets up, and we see his dhoti (trowser) is really soiled. In the next scene the dhoti is clean.
In the village fair, Billu is shown sitting in one of the 14 carriages of a giant wheel. In the next shot, the giant wheel is shown moving, but Billu is not seen any of the carriage.
Throughout the movie, Sahir Khan's hair changes between solid black and having frosted highlights.