Would you want to play seesaw with an elephant?

I posed this question to the children at the start of meeting time.  Before I heard their answers, I asked them to think about it first and come to a conclusion.  Together we watched different sized characters testing out a seesaw.  We saw their struggle when the seesaw was unbalanced and wouldn't work.  

I asked the question again.  Did the students' opinions change?  For some, it did.  At first it may sound fun to play seesaw with an elephant, but it really would not work out well.  This was the start of our investigation on the ways to test out weight.  

Next we grabbed familiar materials (blocks, tape, balls, etc) and tried to make seesaws of our own.  Here is a picture story...A lot harder than it seems!

Here are our representations of what we found: