Tronex - Product - Amazing Toys

32019

18+ 神奇电子实验室连扬声器
超过18个精彩的教育性实验
---高灵敏光控装置启动不同的门铃声
---奇妙的触控装置着亮LED灯
---简易的磁控开关装置
---使用二枚5号电池 (不包含在产品内)

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