Trying to think up some tricks to play on Mom and Dad for April Fools' Day, Harry and his little sister, Emily, know they'll need something even more special than the plastic spiders and whoopee cushion they used last year. A trip to the magic shop gives them all they need to play some tricky tricks, but Harry thinks Emily is too little to fool him. Can Emily come up with a trick that will surprise her big brother? A popular children's author takes a gently humorous look at sibling rivalry in this tale of a holiday loved by kids of all ages.