Campaign poster 'only children can fully see'

Last updated at 17:25
Anar Foundation poster

A poster designed to be fully seen only by children has been used by a Spanish charity.

When looked at from a child's height, a "secret" message showing a helpline number shows up.

Anar Foundation poster explained
Lenticular printing means you see a slightly different image depending on where you look from

The poster uses a technique called lenticular printing - which means looking from a different angle shows a slightly different image.

It's being used as part of a campaign by the Anar Foundation to tackle child abuse.

Lenticular printing is also used to create 3D effects and make things look animated.