We used water and baby oil to see how M&M's would respond to both liquids.
Students made predictions about what they thought would happen in the baby oil and what they thought would happen in the water.
After a while, in the water, the M&M will lose it's coloring and the M will slowly float to the top of the water and completely disconnect from the candy.
The kids used a sheet in their learning logs to write about what happened.
Original article and pictures take http://www.firstgradenest.com/2014/03/stem-m-soaking.html site