Offers young readers information on shadows, including how they result from a source of light and how they change with changing conditions.
奧斯卡和蟋蟀 : 為什麼會動?
好玩的氣球
哇!原子跑出來了 : 3D擴增實境A ...
大自然的魔術師
我的小小急救手冊
The magic moving p ...
What makes a magne ...
耶穌的禮物
The wind blew
Light and color
Solids, liquids, a ...
When cloud became ...