Big Bird tries hard to convince the grownups on Sesame Street that his "imaginary" friend the Snuffle-upagus really exists.

On his way to visit Snuffy, who is sick in bed with the sniffles, Big Bird gets loaded with presents from other well-wishing friends.

"Once upon a time, there was a pretty young chicken named Camillarella, who had very heavy shoes and an enchanting Chicken Dance. Or maybe you'd prefer to hear

Meet all of the Muppet characters in this illustrated early reader. © Disney

Although his extreme bashfulness sometimes prevents Mr. Snuffle-upagus from enjoying himself, his Sesame Street friends keep telling him, "Don't be shy]"