Sam and I love documentaries. In fact, on our first date we went and saw a documentary at the Clark Planetarium in Salt Lake! Currently there isn't much time to sit down and enjoy a full-length documentary together, but NOVA makes little 3-7 minute features that we like to watch when we get a few free minutes. One evening we watched one about snail slime and how some synthetic material that mimics its behavior may be used in medicine. It becomes gel-like when pressure is applied, but it is hard without pressure. I mentioned to Sam that it was like ooblik (cornstarch and water mixture), except backwards. He had never had the singular privilege of playing with ooblik, so I quickly whipped up a batch and we had some fun with it!
I love this stuff!