By age 2, children who are read to regularly have better language skills, bigger vocabularies, and stronger cognitive abilities.

Raikes, H., Pan, B.A., Luze, G.J., Tamis-LeMonda, C.S.,Brooks-Gunn, J., Constantine,J., Tarullo, L.B., Raikes, H.A., Rodriguez, E. (2006). “Mother-child book reading in low-income families: Correlates and outcomes during the first three years of life.” Child Development, 77(4).