Toot and Puddle Wish You Were Here by Holly Hobbie
A bee stings Toot when he takes a trip to the Wildest Borneo. He comes down with a case of the Violet Virus and turns blue. When he returns home, Opal and Puddle try to nurse Toot back to health and find the cure in a nearby meadow. Holly Hobbie's latest in the Toot and Puddle series is a fun adventure that kids will love.