Why does a physical book hold one's attention longer than a book one only looks at?

A book that is only illustrated, however visually polished it may be, offers an experience limited to a single sensory channel: sight. This limitation, barely perceptible to an adult accustomed to prioritizing this sense in daily life, significantly reduces the richness of the experience offered to a toddler who is still heavily dependent on touch to explore the world.

Touch indeed provides an additional layer of information that sight alone can never convey: texture, temperature, the resistance of a material, the precise sensation of a relief under the fingertips. This information, essential for a baby, considerably enriches their overall understanding of a given object.

A felt book, by adding this tactile dimension to the visual experience, thus multiplies the possible points of engagement for a baby's attention. Where an illustrated book offers only a single source of interest, a felt book proposes several simultaneously, naturally extending the duration of engagement.

This multisensory richness also allows a baby to return to the same page multiple times without ever completely exhausting their interest, as each new tactile exploration brings a slight variation in the perceived sensation, unlike a static image which, once visually memorized, quickly loses its ability to captivate.

Developmental neuroscience also confirms that experiences combining several simultaneous sensory modalities create stronger and more lasting memory traces than experiences limited to a single sensory channel, a principle that applies directly to the comparison between a tactile book and a purely visual book.

This tactile dimension takes on particular importance during the very first months of life, a period during which touch remains one of the most mature and reliable senses for a baby, long before sight reaches its full acuity and full capacity for fine detail analysis.

It is this combination of visual and tactile richness, unique to the felt book, that largely explains why this type of object manages to capture a toddler's attention for a long time, whereas a simple illustrated book often struggles to maintain their interest beyond a few moments.