The science core lecture was all about discrepant events.

The reason for discrepant events is because it is something that is outside our expectations from the model of how we think things work.

Question: Will a *paper* cup filled with water burn if a 1000 C bunsen flame is placed underneath it for a period of time?

Most people will say yes, it should burn.

But if you run the experiment, it in fact actually doesn't.
The water actually eventually boils.
Boiling water in a paper cup! It's quite impressive.

And so a discrepancy in their explainations begins curiosity and inquiry, and thus you teach from that point.

The other demonstration Tony held that lecture was a milo tin with a hole punched in the lid and bottom, about the size of a 10 cent peice (about 1cm diameter?) enough so that a rubber gas pipe could be placed into the bottom hole.

After turning on the gas, he lit the tin.
A large flame shot out the top hole, and continued to burn brightly.
Turn off the gas tap.
What do you expect to happen??

Well, the flame burns, and as it burns, it gets lower and lower. Remove the gas tube so the hole in the bottom is open.
The flame changes from a orange wavery flame to a intense blue flame. It is continually getting lower and lower.
Why?
Then, suddenly, *BOOM* the lid of the tin goes flying.
An explosion!
Why?!

Something like that also invokes their thoughts, and start questioning and you can use to teach off.

Both pretty good examples of discrepant ideas.