From Matilda and Where's Wally to Harry Potter and Rapunzel, creating a costume isn't as challenging ... and a marmalade sandwich. 11. Diary of a Wimpy Kid This is very easy.

You can purchase World Book Day costumes from Amazon and Argos also offers some great costume ideas ... Gregg Heffley from Diary of a Wimpy Kid - You need to get a little creative with this ...