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- S3.E1 ∙ Encyclopedia of Discovery: Primary Colors
- S3.E2 ∙ Encyclopedia of Discovery: Reading a Clock
- S3.E3 ∙ Encyclopedia of Discovery: States of Water
- S3.E4 ∙ Encyclopedia of Discovery: Ants
- S3.E5 ∙ Encyclopedia of Discovery: Recycling
- S3.E6 ∙ Encyclopedia of Discovery: Illusions
- S3.E7 ∙ Encyclopedia of Discovery: Energy
- S3.E8 ∙ Encyclopedia of Discovery: Clouds
- S3.E9 ∙ Encyclopedia of Discovery: Sleep
- S3.E10 ∙ Encyclopedia of Discovery: Maps
- S3.E11 ∙ Encyclopedia of Discovery: Classifying Animals
- S3.E12 ∙ Encyclopedia of Discovery: Stars
- S3.E13 ∙ Encyclopedia of Discovery: Planets
- S3.E14 ∙ Encyclopedia of Discovery: Pollination
- S3.E15 ∙ Encyclopedia of Discovery: Seasons
- S3.E16 ∙ Encyclopedia of Discovery: Gravity
- S3.E17 ∙ Encyclopedia of Discovery: Trees
- S3.E18 ∙ Encyclopedia of Discovery: Making Cartoons
- S3.E19 ∙ Encyclopedia of Discovery: Earthquakes
- S3.E20 ∙ Encyclopedia of Discovery: The Water Cycle
- S3.E21 ∙ Encyclopedia of Discovery: Eclipse
- S3.E22 ∙ Encyclopedia of Discovery: Volcanoes
- S3.E23 ∙ Encyclopedia of Discovery: Music
- S3.E24 ∙ Encyclopedia of Discovery: The Ocean
- S3.E25 ∙ Encyclopedia of Discovery: Electricity
- S3.E26 ∙ Encyclopedia of Discovery: Drawing