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STEVE SPANGLER: Well, this might
look like just a giant
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pile of silly putty.
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It's actually homemade gak using
glue and water and a
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little bit of Borax.
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Believe it or not, this gak--
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gooey material--
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can be used to learn something
about the science of glaciers.
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I'm Steve Spangler, and I'm all
about making science fun.
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For the last 20 years, I've
been teaching ways to turn
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ordinary science experiments
into unforgettable
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I have an amazing team who will
do whatever it takes to
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affect the way people
think about science.
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And to do that, I live
by one motto--
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make it big, do it right,
give it class.
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So how do you make the stuff?
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It's very, very simple, but
there's a change the normal
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recipe that you may
have found online.
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And so these are the materials
you're going to need-- a
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little bit of glue--
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OK, a lot of glue--
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some water, and some
Mule Team Borax.
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A box of this will last you a
life, but this is the secret
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to making all the slimes and
gaks and ooze and all those
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It's the cross linker.
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We'll talk about the chemistry
here in just a second.
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First, the glue.
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I would suggest using
Elmer's Glue.
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Don't use school glue
or anything else.
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Elmer's Glue is actually
polyvinyl acetate, and
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polyvinyl acetate has the same
behavior as polyvinyl alcohol,
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which is the main ingredient
for slime.
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So that's why it
works so well.
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You think of this-- it's
just like spaghetti.
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You cook spaghetti, and
in the pot, those
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noodles move around.
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The pasta moves back
and forth.
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Even when you drain the water,
it still slips and slides all
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over each other.
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That's exactly what
glue is like.
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Once glue dehydrates, though,
and all the water's gone,
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those molecules now stick into
place wherever they were.
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And so that's how glue works.
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What we want to do is to
keep all the moisture.
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In fact, we want to add some
moisture and hook the
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molecules together
at the same time.
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All right, I'm adding water.
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It's hard to tell you
exactly how much.
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