Does anyone remember the melted crayons on canvases that monopolized Pinterest a few years back? The crayons look like they are raining colors over a silhouette of a couple with an umbrella, and all of America went nuts and thought we needed to try it. Well, as usual, I am about 4 years late to the trend, but I decided to sit down and try it. My nephew is about to turn 2 and is having a Trolls themed party. If you've seen the movie Trolls (watch it, so cute), you know that it's all about the…