Is this normal for a 4 month 1 week baby?

Lol I laughed about the head shaking left to right! Ur baby is perfectly normal. My brother was doing some of the same things at 3-4 months. He would scoot back bc that's how he was building muscles. Making noises is learning how to communicate. Babies are great at observing and learning bc they don't have much in their head to begin with. Ahahaa, still laughing at the Baby Einstein thing XD