A fantastic way to show a reversible change, these polymers absorb 200 times their volume of water!
They change from small hard spheres into large soft spheres in a matter of minutes and can be used over and over again.
Weight: 15 g
13 Apr 2016
Interesting item. Stones are more like tiny tiles than stones. Tried half a packet. They swell reasonably slowly, so you can watch continuously, or on and off to see the difference. Didn't get quite as large as I expected, and more of a blob effect, rather than a stone. Left them at school to dehydrate so can't say how well this is achieved. Interesting product.
08 Feb 2016
14 Dec 2015
04 Sep 2015
Packs are very small but effective.
03 Sep 2015
19 Aug 2015
These little stones amaze me and the children I work with!
09 Jul 2015
Not sure suitable for children
Our ResponseThank you for your recent feedback. We are sorry to hear that you have had an issue when ordering with us. I can assure you that this will be investigated and someone will be in contact with you shortly. Kind Regards
19 Jun 2015
21 Jun 2015
Was a bit disappointed as I expected them to get larger than they did but the kids loved them which is the main thing!
15 Jun 2015
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