10本PDF电子书和配套音频mp3 ，个别书有Activity Book。
level3
1. Amazing Minibeasts
2. Animals in the Air
3. How We Make Products
4. Life in Rainforests
5. Festivals Around the World
6. Free Time and Around the World
7. Sound And Music
8. Super Structures
9. Wonderful Water
10.Your Five Senses
