软件类别：iOS软件\n\n,
软件授权：免费软件\n\n,
运行环境：ios\n\n,
软件语言：英语
\n\n,Hydi Gets an X-Ray - A new Perios animated story reader for children age 5 . In this Perios story, Hydi decides to visit her friend, Helen, an Aerogen. She travels through Perioland and sees the Perios in their home regions. But when she tries to pass through the Halogen territory she runs into trouble. In the first story, readers learn that Perios have protons, neutrons and electrons inside them. Age Range: 5 Grade: K-4 Pages: 21\n\n
下载地址：iTunes 或者AAP STORE 下载
