Today's nifty observation was shared by 12 second graders and their teacher. I was teaching a program on making maple syrup, and we came up to "Grandmother Maple", a tree that might be over 200 years old, and there was sap dripping out of some branches that were pruned last fall. What a great way to dramatize the probable mode of discovery of maple sap as a tasty food source. Have you ever tasted a sapsicle? It will be just a teeny bit sweet, because as the water freezes, the sugar gets concentrated. Of course, sap doesn't taste like much until you boil it for hours and turn it into syrup. But all that hard work sure it worth it when you taste that maple gold.
(photo from http://ohioline.osu.edu/for-fact/0036.html)