The little boy is eating a banana. Sometimes the banana is half gone and than you can see the whole banana.
As the little boy closes the hood of the car, all of the tools slide into the engine compartment. Two shots later, as Harold cranks up the car, they're back on the open hood.
When Harold pulls over to fix his car he takes off his hat and puts it on the car. When the little boy comes over to watch, the hat disappears and then reappears within several shots in the scene.
In one scene Lloyd's hat is smashed in and in the next scene the hat is like new.
When Harold chases the little boy at 14:55, he slips on the banana peel once again, but his foot never actually touches the peel.