If you need S3-compliant storage for testing and development, you can use an S3 mock server. I've tried the following for use in web development and CI environments, they are lightweight and configurable:
There is also Localstack. I found this one to be a bit more complex than the ones above and ended up not sticking with it.
You can try turning it into a retro gaming station by installing RetroPie. Some have got it working on as little as a Pi Zero. Of course, that laptop won't be able to run the more demanding emulators.