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Trace your shadow, then make it change.
Use straight lines to learn about circles.
String and scissors are all you need to find pi all around you.
Use your cell phone to explore the mini-scopic world.
你能看到水有多远？
有气体储存质量。
See yourself with infrared vision.
作为一项任务变得更加复杂，需要更多的心理努力 - 这需要时间。
Stamp your feet and make a miniature earthquake.
Wispy lines show the path of tiny, high-energy particles generated by cosmic rays.
了解二氧化碳如何从大气中移动到海洋。
找到树，纸火箭或北星的高度。
