The sticker chart: If Side doesn't fill up his chore chart with stickers, he'll never get a new turbo-mega-rocket ship toy. So, Sid wonders, who needs charts anyway? After a day of investigating, Sid learns that charts are great science tools that help you compare and contrast all kinds of cool stuff like snacks, pets and even chores!; The rolie polie (Observation): Sid loves his little rolie polie bugs, but they're so little he can't figure out how they move. At school, he discovers an amazing science tool: the magnifying glass! Sid and his friends explore their world using the magnifying glass to make things look bigger, like freckles on their skin, little pebbles and rolie polie legs!; Enough with the seashells: Sid brings home an estimation jar from school, filled to the top with seashells. He's determined to guess how many there are, but he has a problem-- there are too many shells to count! At school, Sid and his friends learn a new strategy for making their best guess - estimation! Now Sid can estimate just about anything - shells, toys, leaves and stars in the sky!; The whale episode: Sid is troubled-- he wants to know how to measure a giant blue whale with his ruler. At school he learns a great new way to measure just about anything - using the method of non-standard measurement! Sid learns how to accurately measure things with shoes, blocks and even people!