The third robot makes sure the containers are about the same weight.
If the container is empty, the robot should turn on a light.
If the container is too heavy, it should turn on a different light.

Job 3, Day 2

What have you decided to do?

We made a small teeter-totter and it's got to be bigger but we couldn't say what we... wanted to and this...

...didn't know what he was talking about so he had to show us.

You're making a bigger one next day?

We'll keep this one too.

Job 3, Day 3

How is it coming along?

We got the lights to come on. Now we're building the bigger version.

The parts with the holes drilled through them are very expensive. Could you use a cheaper part and still get the job done?

We need some with holes at the top. The other ones don't.

OK.

Job 3, Day 4

We have a problem with the sensor. It falls between the holes in the Lego at the bottom. It doesn't go off and it flops too much from side to side. That is what we have to fix next.
 

 

Day 5 and 6...

 

 

 

 

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