Linking two words

We have seen an exponential growth in language since beginning her transition to the "big girl class". Yesterday she linked two words together "Bye-Bye Da-Da". Which of course Paul is over the moon about. Today it was "A Book". She also is repeating more words and saying spontaneous words to us that are appropriate (ex. we put her down tonight and she waved and said "Bye-Bye". So cute.