It's Dee Dee's birthday, and what she wants more than anything else is a pony. So Dexter decides to build her one in his lab. Dee Dee is delighted with the pony -- but then she wants it to fly. And talk. And play the radio. Before he knows it, Dexter has created a monster! Can he conquer his own invention... before it gallops crazily off into the sunset with his pesky older sister?Scholastic, Inc. Staff is the author of 'Horse of a Different Dexter' with ISBN 9780439385817 and ISBN 0439385814.