Julian's Glorious Summer by Ann Cameron

Julian isn’t afraid of lions or tigers, but he is scared of . . . bicycles?
 
Julian’s friend Gloria has a brand-new bicycle. She makes riding it look easy, but Julian is scared. Bicycles are shiny, whizzing, wobbly things. And he’s not ready to ride one. But he can’t tell Gloria he’s scared, so he tells a fib instead. He almost gets away with it . . . until the fib backfires and he’s got an even bigger problem!