Engineering challenges for children. Today we're designing plastic bottle cars to put to the test on our obstacle course.
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Hello, I'm Bitz!
And I'm Bob!
-We love make and do!
And with a little bit of know-how...
You can do it, too!
# We can work it out
# Whoa, whoa, whoa
# Ah, ah, ah
# We can work it out
# We'll invent a way
# Through ideas and play... #
-Bitz and Bob!
-# Will save the day. #
Bitz and Bob, Bitz and Bob, Bitz and Bob!
Do you remember what happened with the Desert Ranger 3000, Bob?
Yeah! We added stuff to make it the Desert Ranger 4000.
We over-engineered our vehicle.
-We added wings, a hammock and a slide.
But then it didn't work properly for what we needed it to do.
Ah! The slide's been dragging along the road.
Lots of things are engineered for a special purpose.
To go over bumpy surfaces, this car has big chunky wheels
and its body is high off the ground.
Or to go really fast, racing cars have smooth low bodies
with super grippy tyres to give them a good push.
Brrrrum, brrum, brrumm!
Now it's your turn to try.
They've got loads of things
they can use to make a car with.
And they're designing their cars to get down this track.
Look at this car. It has a double layer on it.
Wow, that's so cool!
They're putting wings on theirs.
Oh, yeah! And they're off!
Oh, no! Their cool car is too big.
Whoops! They can try again!
Here's the next team.
You can do it!
It's a bit too tall.
Although their cars look so great, they've been over-engineered
with too much stuff and they can't get down the track.
That's just like what happened with our Desert Ranger 4000.
It's time for a Bitz Brain Blitz!
First, the slide was dragging along the road, slowing us down
and making the ride bumpy.
And now we can't drive up this hill because it's still too heavy
with all the extras we added to it.
We over-engineered it.
Come on, let's get rid of everything we don't need!
I want to use it for exactly what it was designed for
and that means losing the extra bits that were slowing us down.
# We're on our way to the big cactus... #
We're moving much faster now!
They're re-engineering theirs.
Cool! Let's see if it's fit for the job, Bob.
Oh, it's still too tall
to get under the low bridge.
You're going to have to take off more.
There's no more double-decker,
but maybe this car's fit for purpose now
and can get down the track.
Oh, yeah! Let's see it again.
Steam pink style!
Keep engineering and inventing away to save the day!
-You can do it, too!
We're designing plastic-bottle cars to put to the test on our obstacle course. But can over-engineering stop the cars getting around the track? A simple re-engineer could solve the problem so the cars are fit for purpose.