Here is a simple trick that I have taught 5-8 year olds in a magic class back when Harry Potter was first became popular.

[URL=http://s1088.photobucket.com/user/TheCreator7/media/0-%20Artwork%20of%20Mine/Online%20Magic%20Tricks/Rope%20trick%201_zps6xqrmsz9.png.html][IMG]http://i1088.photobucket.com/albums/i325/TheCreator7/0-%20Artwork%20of%20Mine/Online%20Magic%20Tricks/Rope%20trick%201_zps6xqrmsz9.png[/IMG][/URL]