I think this pink, hardcover diary with gold tone heart lock is perfect for kids and adults. It comes in a pretty gift box, too.
The exterior is a padded, faux leather with a simulated texture. There's a small key on a chain that you can put on a necklace or keep safe in a secret spot.
The pages are lined and there are 148 of them so you get almost 300 pages of space.
There are no decorations or memo fields at the top so you get the full space for just your own writing.