Mariah waves bye-bye & almost crawls

Mariah is getting more and more fun every single day. She loves to play now and is mobile but its not quite crawling. . . who knows. She does a backward scoot and gets up on her knees some but just hasn't decided to go for it yet - she will any day now though. She also waves "hey" and "bye-bye" and will repeat both words. Its so cute - but still no "MaMa."