Sid and his friends try to determine which of his accumulated scientific tools is his favorite: the chart, the estimation jar, the magnifying glass, or the ruler.
When Sid's shoes don't fit, he declares that his shoes must be shrinking. Sid and his friends discover that it's hard to see things growing, because growing happens slowly over time. It turns out Sid's shoes weren't shrinking -- he was growing!
Wondering why the tag in his shirt is itchy and not soft like the rest of his shirt, Sid and his friends learn about the different possible textures around them: smooth, soft, bumpy and itchy.
Waking up to find his favorite smell of cooking pancakes replaced by the smell of his baby brother Zeke's stinky diaper, Sid learns how smells travel through the air and arrive inside the nose.
Trying on Grandma's glasses and discovering they make everything look blurry, Sid explores explores his sense of vision and discovers that they make things look clear to her.
Noting that everything becomes quieter when he covers his ears with his hands, Sid explores his sense of hearing, discovering how sounds travel through the air and into our ears.
Sid remembers what he learned the past week about ways to keep your body healthy, the importance of brushing your teeth, exercise, and proper nutrition.
It’s a special day at school, it’s Bug Club Day! Sid and his friends use their magnifying glasses and discover ants, rolie polies, and caterpillars around the playground.