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Oh, sodium polyacrylate.
How I ♥ you.
At 99 cents a pack from Michaels, you are truly one of the cheapest forms of quality science-geek entertainment. I think my housemates are getting sick of hearing me wax rhapsodic about it. "Look! Now it's invisible! Now you see it!...Now it's invisible again!"
At 99 cents a pack from Michaels, you are truly one of the cheapest forms of quality science-geek entertainment. I think my housemates are getting sick of hearing me wax rhapsodic about it. "Look! Now it's invisible! Now you see it!...Now it's invisible again!"