God Save The Queen, for piano duet 4 hands.
Pages: 4 pages (2 pages both hands, 1 page prima, 1 page seconda), with downloadable mp3s for audio help.

The pleasure of love, is a classical French love song written in 1784 by Jean-Paul-Egide Martini (17411816).
Here is an arrangement for easy piano duet 4 hands.
With downloadable mp3 for audio-help, 2:28 min

La Marseillaise was written in 1792 by Claude Joseph Rouget de Lisle in Strasbourg after the declaration of war by France against Austria, and was originally titled "Chant de guerre pour l'Armée du Rhin". The Marseillaise was a revolutionary song, an anthem to freedom, a patriotic call to mobilize all the citizens and an exhortation to fight against the tyranny and the foreign invasion. The French National Convention adopted it as the Republic's anthem in 1795.
Here is a piano duet 4 hands arrangement, 4 pages (2 pages both hands, 1 page prima, 1 page seconda) with downloadable mp3s just for audio help.

12 short duets for 1 piano 4 hands.
Includes Reverie, A little waltz, Merry go round, March, Rememberance, Waltz, Quite contented, Bag-pipes, Bolero, The Brook, Lullaby, Good-by.
Easy piano,15 pages.
With downloadable mp3s for audio help.

Three preludes for piano duet 4 hands, by R.Hahn.
Includes :
The Little Red Lark, My Love's An Arbutus, The Willou Tree.
Contains separate sheet music parts for each player, and sheet music with both parts together.
With  downloadable mp3s for each player and both, and midi files for practice, 31 pages.