When Hal is sitting on the couch when Dewey comes to talk to him he is holding his glasses in his left hand and a newspaper in his right hand, but in the next scene he is only holding his glasses.
Dewey takes Hal to the park for remedial kite flying. At launch the Sun is on their right. As Hal runs it is on his left.
When Dewey & Hal first fly a kite, the park is in full shade then full Sun.