In this tutorial, we learn how to make blue silly putty. To make this, you will just need borax, glue, and food coloring. First, pour a cup of water in a bowl with a couple tablespoons of glue and some borax. When it's all poured in the bowl, mix it together. After this, add in the food coloring until you have the color that you want. Mix the putty together until well combined and then play with it! You can store it in a plastic container to play with later and use for whatever type of craft that you would like!