Top Builder: Toothpick Bridge | Design Squad

♪ ♪ Hi, I’m Deysi
from Design Squad Global. And I’m challenging you
to build a bridge that can hold the weight. The bridge needs to be made…
out of toothpicks. Here are some tips
for you to think about when you’re building
your toothpick bridge. Toothpicks are a weak material. It’s not hard to break
a toothpick in half. But there are things you can do
to make them stronger. For example, several toothpicks
grouped together are much harder to break
than a single toothpick. (groaning, laughing) Toothpicks are also strong
under compression. That means that
they can hold weight when you push down on them. See? I’m pressing from the top
and the bottom. Another way to build
strong structures made out of weak materials
like toothpicks is using strong shapes
like triangles. You may have heard that
triangles are strong. That’s because it’s hard to make
a triangle lose its shape. Take a look at this pyramid. The sides are pretty sturdy
and don’t shift much when I push down
on top of the structure. It maintains its shape. But see what happens
when I push down on this cube. It doesn’t take much pressure to
make the sides of the cube bend. So I’d suggest that you
incorporate triangles into your toothpick design. To build your bridge, you can use any type
of fastener you want: clay, foam, or craft glue. Don’t use super glue
because it dries too quickly. And most important of all,
be patient. Let your glue dry. You may want to build
separate components first, let them dry, and then glue
the components together. You see all the triangles? I built these first, glued them,
let them dry, and then put the rest
of the components together. I also kept a close eye
on my connections. These are the places
on your bridge that are more likely to fail. So make sure that your corners
are nice and tight, and your toothpicks line up. This style of bridge
is called a truss. Trusses use the power
of triangles to hold weight. Look at all these triangles
in my design. You could probably find some
truss bridges where you live. Let’s put these triangles
to the test and see how strong
my toothpick bridge is. I’m going to see how many books
my bridge can hold. And slide. I think that my bridge
will collapse on its side because there’s no triangle
support going down the middle. As you can see,
it’s only squares. So let’s test it out. Okay, that’s one. Two. Three.
It’s bending a little bit. Four. And… it collapsed. (laughing) See, it collapsed this way,
just like I thought. But it’s amazing because
my bridge held five books. Before you start building,
make sure you have a game plan, sketch out your idea,
and follow your sketch. Then gather your materials
and make sure you have enough to accomplish
your building goals. What kind of design
are you going with? How much weight
does your bridge hold? How wide is your bridge? We want to know. Tell us about
your toothpick bridge on the Design Squad Global

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