[Nfb-science] science experiments

[Blaine Clark]

If you can get some of those dried sponge toys that have recently been 
banned in the US because they pose a health hazard to small children who 
can swallow them, you can let your students feel them before they go 
into the water and perhaps two or more can keep their hands on them in 
water as they expand. You could even just partially immerse them so they 
could feel the portions under water versus the portions above water and 
tell how the water/air division area softens and partially expands as 
water starts to creep up. You should be able to do this with regular 
hard dried sponges too.