What do you get when you cross words with numbers? Wumbers, obviously. Writer Amy Krouse Rosenthal and illustrator Tom Lichtenheld have filled their new picture book with rebus-style words that will be lots of fun for kids at the like-to-be-clever age. (Hint: that would be all ages.) Rosenthal will be at the Red Balloon on July 17 for a reading that will be slumber-party-themed, with PJs and pillows encouraged. Unfortunately, the Oneders were not available to play the gig.