Silicone molds are a new found treasure in our home. They can be used for baking, as well as crafting. We found a set of three Lego shaped molds on Amazon (they can be found here). 

The preparation; We collected all of our old or broken crayons, peeled off the labels, and cut them down to a smaller size. When filling the molds, you'll want to make sure that the molds are full but not overflowing. 

To melt the crayons; We baked ours in the oven at 325 degrees, for about 15 minutes (or until the crayons were completely melted). Then carefully removed them from the oven and allowed them to cool for about an hour.