We've been there. Remember that, though highly annoying to us, even yelling is a learning experience for children. Babies and toddlers don't have the ability to decipher where it is acceptable to yell and where it is not.
By Ellen Rosenberg Aug 20, Photo: iStockPhoto. At 18 months, a child usually knows more than 50 words, says Elaine Weitzman, a speech-language pathologist.