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9 Simple Inventions That Make Us Ask, 'Why Didn’t I Think of That?'

From baby bottle to slinky and on to Rubin Cube - Nine Inventions that are not nine day wonders.

9 Simple Inventions That Make Us Ask, 'Why Didn’t I Think of That?'
That is such a cool link. My favorite one is the Rubik's cube. The other reason I was writing you is because I can't figure out how to post a problem on this site I am only able to reply to other posts. I was hoping you could tell me how. Thanks in advance.
It’s possible that you joined very recently and are in a way on probation. There are some requirements before a member can start discussions. Please see the threads here:
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Kaustubh Katdare
Kaustubh Katdare • Feb 18, 2018
I'd explain; but we all should rather wait for the new CE 😀
bharathi raina
bharathi raina • Feb 19, 2018
Sir i am 3rd year student doing my in chemical engineering branch give me some topic or ideas for mini project
How about a low cost solar water still using polythene bag and a water bottle? You can expect about 150 ml clean water per sq.ft. of exposed water surface in full sun light.

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