As the name suggests, memory books are made to collect and keep a record of one's memories of special events that they want to recall.
For a memory book, you can have different themes for it or make sections related to different things in your life e.g. childhood, family, school memories, word diaries, out and about.
Then you can paste different pictures or stickers, add any quotes that you like and make fun doodles and drawings to compliment it.
Paintings were often done on stone, and portrayed pleasant scenes of the afterlife in tombs. Ancient Egyptians created both monumental and smaller sculptures, using the technique of sunk relief.