1When a villain comes to town, it's up to Molly, Gil, and the rest of Nickelodeon's Bubble Guppies to become superheroes and save the day Boys and girls ages 4 to 6 will love this fun-filled Step 2 Step into Reading leveled reader which features a shiny cover and over 30 shiny stickers. Step 2 readers use basic vocabulary and short sentences to tell simple stories. Children who recognize familiar words and can sound out new words with help will love this book.