It is a perfect way to refine motor skills. It allows children to be focused on a task, and learning how to lock will help them a lot in daily life.
Children will discover the Control of Error Montessori principle, which means that they'll be able to correct themselves if they don't match the right key to the right lock.
The set includes:
Beechwood tray (9.5 x 7.5 x 1.5 inches) and 4 different locks with keys.