Between the ages of two and three, your toddler’s vocabulary will probably double. She’ll speak in longer, more complex sentences. She might play and talk at the same time. Strangers will probably be able to understand most of what she says by the time she’s three.

Here are some of the things your toddler might do as her language and communication skills develop between the ages of two and three years:
Bates, E., Dale, P. S., & Thal, D. (1995). Individual differences and their implications for theories of language development. In P. Fletcher & B. MacWhinney (Eds.), Handbook of Child Language (pp. 96-151). Oxford: Basil Blackwell.
Fenson, L., Marchman, V. A., Thal, D. J., Dale, P. S., Reznick, J. S., & Bates, E. (2007). MacArthur-Bates Communicative Development Inventories (2nd ed.). Baltimore: Paul H. Brookes.
Flipsen, P., Jr. (2006). Measuring the intelligibility of conversational speech in children. Clinical Linguistics and Phonetics. 20, 4, 202-312.
Owens, R. E. (2001). Language development: An introduction (5th ed.). Boston: Allyn & Bacon.
McLaughlin, S. (2006). Introduction to language development (2nd ed.). San Diego: Singular.
Roth, R. P., Speece, D. L., & Cooper, D. H. (2002). A longitudinal analysis of the connection between oral language and early reading. Journal of Educational Research, 95(5), 259-272.