This week we decided to put this learning to the test to see if we could build
1. a crane
2. a tow truck.
It was fun. :)
My son built this crane.
I put it to him as a challenge.
He tried it out several times before he was able to make one strong enough to lift the weight of one lego car.
He came up with this question that I couldn't answer, perhaps one of my readers can.
WHY does it get harder for the crane to lift the higher up it lifts an object?
I did tell him that it had something to do with gravity but I couldn't fully explain it to him.
This particular beauty was harder to build than I expected. Like my son I had a couple of false starts, but eventually I got it to work. The hardest part was figuring out how to get the string to wind around the pulley (and it still never worked perfectly) but at least it was able to exert pressure on the car and pull it forward (ergo a success).
We been using the God's design Curriculum for our learning, but if you don't have that curriculum here are some places you can go for additional help.
PDF on simple machines.
Easier to lift submerged items.
Unit Studies from
Hot Chalk. Our Journey Westward.
For information on doing Lego check out this link: http://brickdave.com/how-to-learn-with-lego