I have just recently started using resin in my crafts and have loved it. I found out about resin this year and did one batch of keychains so far and hope to do more with it this summer. Below is a video on making resin keychains!
Link to video in YouTube "Resin Keychain Video"
When crafting with resin, there are a few different materials you will need. The video mentioned some but I use the 2 types of resin, resin and hardener. I also use glitter and gold flakes in some of my resin. You will also need sticks or spoons to mix your resin and a cup or container to mix your resin in. I use silicone molds for my resin, since it is easiest to come out of the mold. But, you can also use plastic molds, just be sure to spray them so they don't get stuck.