The Crystal Art Secret Diaries is calming and therapeutic and is appropriate for both adults and kids (ages 7+) and approximately 2 to 3 hours to completion. The outcome is a gorgeous work of crystal art. A personal journal or notebook known as a "diary" is used to keep track of everyday experiences, thoughts, feelings, and reflections. It is a tool that gives people a platform for self-expression and personal development by enabling them to reflect on and document their lives. Imagine keeping a secret diary with a beautiful crystal art design and writing about your day in it. Each diary includes 48 lined pages and is 6.1" x 8.5".