Up Periscope!
Learn about reflection, refraction and absorption of light by playing with a fun, re-configurable periscope.
$1.5K
pledged of $500
292%
funded
48
backers
Ended
time left
$48.633
avg/day
A
Funding Grade
Funding Rate
292%
Goal exceeded
backers
48
1.6/day avg
Total Raised
$1.5K
Goal: $500
Timeline
Created
Dec 3, 2014
Launched
Jan 23, 2015
Deadline
Feb 22, 2015
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数据来源: webrobots.io