This is one of my favorite experiments. We did one back in August of last year and my oldest really enjoyed it, back then we just made a Magic Tree but this time I thought it would be fun to turn it into a fun Christmas Tree Science Experiment.
My little one helped this time and every day would come into the kitchen and start yelling “TREE GROWING, TREE CROWING!” This really turned out to be a fun Holiday Science Experiment but both girls. The only thing we changed from the last one we did is that we only used green food color on our tree to make it look more like a Christmas tree. I am thinking we maybe should have put the food color over all the cardboard so that it was all more green but it still looks awesome and the kids really enjoyed growing their very own Christmas Tree.
What is happening with this experiment? The solution will be drawn up into the cardboard tree, then it will begin to evaporate (this process is sped up by using the Ammonia) . When the solution evaporates, it leaves behind the salt as small, white crystals (which are dyed by the food coloring). This is a good experiment to show capillary action, which is the process of a liquid being drawn up or against gravity.
Now cut down the center of each one from the bottom and one from the top.