Lyle and the birthday party / Waber, Bernard

Lyle becomes jealous during the preparations for Joshua's birthday party.

Lyle, the crocodile, becomes jealous during the preparations for Joshua's birthday party.

"When Joshua Primm has a birthday party, Lyle, a crocodile, turns 'mean, green jealous,' sickens, and is taken to the hospital. Illustrated with nonsensical pictures of Lyle sulking, moping, or cavorting in a hospital gown.".

Jealousy over a birthday party for someone else makes Lyle the crocodile seem sick, and he ends up in a hospital for people.