Baby Shark Plush Musical Toddler Blanket - Plays Theme Song! Baby Shark Doo Doo Doo Doo... If your little one loves the popular Baby Shark song, they are going to love this Baby Shark Musical Blanket! Your child can snuggle up and sing along with the beloved Baby Shark family featured on this soft, warm and cuddly plush blanket. Just press to hear the song over and over again for hours of musical fun or cozy up for a good night's sleep, this blanket is perfect to complete your child's bedroom decor, for travel or just lounging around. Machine washable and does not require batteries.