Easter egg: Go to disk 1 "Play Movie". Hit right to highlight the owl to see Harry's Hogwarts letter.
Easter egg: In the 2nd disc, go into the Humans Only door. When all the doors in the vault have stopped and have all been activated by Boo's laugh, hit left to highlight DVD Credits, and you'll view them when you hit enter.
Easter egg: HIDDEN BONUS MATERIAL on the Special Extended DVD Version: There are two secrets on the discs containing the film, one on each disc. Instructions for both: go to the Scene Index on either disc, then scroll down to the LAST scene (either "The Council of Elrond" on Disc 1 or "Official Fan Club Credits" on Disc 2), then scroll down one more time. On the first DVD, a little ring will appear next to the line "new scene." Click Enter. This leads to an introduction by Peter Jackson and the MTV Movie Awards parody on the Council of Elrond (starring Jack Black and Sarah Michelle Gellar), which isn't suitable for children (and does not appear in the UK version because of the BBFC). On the second DVD, scene 48, click on the number 48 - on the right side of the screen - and the silhouettes of Barad Dur and Orthanc appear just underneath, click it. You'll see another introduction by Peter Jackson, and the Two Towers cinematic preview trailer: the one played in theatres after the Fellowship of the Ring, towards the end of its running period.
Easter egg: Region 2, disc 2 of The Mummy Returns there is a 'mummification featurette'. To get to it you must highlight and enter Egyptology 201, then enter 'In depth Look at Mummification' section and press right twice to highlight a scorpion. Press enter to see the featurette.
Easter egg: In the main menu, access Language Selection and highlight any of the 3 English audio selections and press right. You will see Monkeybone. Hit enter to watch the Organ Harvest.
Easter egg: Insert the disk, then when on the main menu, go to "Language select." When on this page, you'll see a picture of Hal and Mauricio. Go up, then hit left, and you'll see a little blue arrow. Hit enter to see a short clip of how the special effects technicians made Maurico's tail work.
Easter egg: On disc 2, highlight Play and click up and Enter. It shows a music video.