Continuity mistake: When Charlie Brown is going to feed Snoopy, you can see at the far of the end counter there is a tin opener which is pointing to the right and there is nothing on it. But when he takes some dog food out of the cupboard, we return to the tin opener and it is now facing left with a plug attached.
Continuity mistake: When Snoopy takes the stick out of the box while demonstrating his trick, the position of Sally changes between shots.
Continuity mistake: When Snoopy takes off his hat and squeezes it down when the boy is shouting in the audience, you can see that Woodstock on the table is holding his magic wand. But when Snoopy goes over to the boy in the next shot, the magic wand is nowhere to be seen.
Continuity mistake: When Marcie announces that Snoopy will perform the "Stick in the Hole" trick at the magic show, Snoopy's position changes between shots.
Continuity mistake: During the magic show, Lucy grabs Linus' blanket and you can see that Schroeder is between her and Linus, but in the next shot Lucy is now beside Linus.