- "Clippety, clop! Clippety clop!" The three Billy Goats Gruff are going across the bridge. But there is an ugly troll under the bridge. He wants to eat them! What will happen?The Three Billy Goats Gruff told in rhyme and with accompanying songs, will delight and entertain all young learners of English. A picture dictionary provides the key words of the story. In the Teacher"s edition, the teacher will find the stage directions for an end-of-the-year performance.