Trouble Remembering Classic Children Book

Okay, I just flashbacked to one of my favourite books as a child and I can't remember the name so I need your help.

What I remember is that the book was turned into a short kid's movie that was highly available at the Library all the time. The film and book involved a kid who I think had a yellow piece of paper or yellow shoebox that transformed into a paper plane and in the end he flew the yellow paper plane over a 2D paper version of New York City with kids popping out of the windows cheering him on...it reminds me of "Harold and the Purple Crayon" for some reason...perhaps they're related? Any ideas?