Here's the situation:
People and goods (weights) need to move along a magnetic track.
Third graders must design a magnetic train that can safely carry as many people and goods across. Students must use the limited materials available.
Students must consider how to place their own magnets on their train designs. If the poles facing each other are opposite, the train will attract to the magnetic track and the train will be unable to move.
Happy designing third grade! When you get stuck...Improve! Improve! Improve!