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You could build a hydrogen generator. Hydrogen soap bubbles, very cool. http://www.metacafe.com/watch/1044705/diy_hydrogen...

Toleration of discomfort in people - getting people to place their arms in ice water for say 3 minutes (and time how long they could save it in and notice what proportion attain the top element) and evaluate to be sure if age has any ingredient. additionally lady who've given delivery clearly have been shown to have a much better discomfort tolerance that lady who have not. Is there a difference between male/lady, different age communities (frequently older people tend to have extra discomfort tolerance than youthful people) What approximately concept and style. you may get people to inform you which ones manufacturers they purchase for product delight eg coke/pepsi and then get them to the two had blind flavor checks (employing precise manufacturers and everyday and get them to cost them) additionally placed pepsi in coke bottles and vice versa or placed a everyday style in it and notice if people think of they're ingesting the style via fact this is the style or via fact they actually like it eg people will drink something out of say coke bottle and prefer it, whether they're ingesting a everyday style and dislike a everyday style, even nevertheless they're ingesting easily coke. it may be interesting. you may chosen different meals products besides.