Nickelodeon's Bubble Guppies learn about trucks in this Step 1 Step into Reading leveled reader that is perfect for girls and boys ages 4 to 6. Plus it features a shiny cover and over 30 shiny stickers! Step 1 Readers feature big type and easy words. Rhymes and rhythmic text paired with picture clues help children decode the story. For children who know the alphabet and are eager to begin reading.