Okay kiddo, so Project FF is like a big puzzle game that some adults are playing. The puzzle has a lot of pieces and it's sort of like building a big machine that can do really cool things. The thing they want to build is something that can make things called "fuels" using a special process. These fuels can be used to make cars go and heat people's houses.
The people playing this puzzle game are really smart and they work for a company called ExxonMobil. They are trying to figure out how to make this big machine work so that they can make these special fuels in a way that doesn't harm the environment. This is important because we want to take care of our planet and not pollute it too much.
So, they use computers to simulate how the machine will work and figure out what pieces they need to make it. They also have to make sure that the machine is safe to use and won't hurt anyone.
Once they figure it all out, they will build the machine in real life and see if it works just like it did on the computer. If it does, then they can start making those special fuels!