One kid pranks his teacher by putting a Common Toad (Bufo Bufo) into his pants. After a few seconds, the toad starts to croak loudly. Not only it is doing typical water frog sounds (such toads do little to no sounds), but also frog sounds done only during mating season.
When Pinocchio changes from being a donkey to puppet again, while he is swimming and talking to the circus owner, he is seen with the rope around his neck in the first three shots. But in the last one, when he says "goodbye" to the circus owner, the rope has disappeared.
When Pinocchio is at the Palace of Justice being tried, he says that he is a thief and he stole a chicken, jewels and many other things. Of course, these are lies but his nose does not grow.