How many languages are there? What differentiates one language from another? Are new languages still being discovered? Why are so many languages disappearing?The diversity of languages today is vari……続きを見る
“An inspirational and helpful resource for parents to help them learn how to foster early communication with their children through baby sign language” (Sabrina Freidenfelds, MPH, IBCLC, founder of ……続きを見る
