Okay kiddo, so a hackerspace is like a club where people who like technology get together to play with things like computers, robots, and other cool gadgets. Now, imagine there is a really big map that shows all the different hackerspaces around the world. The hackerspace global grid is like a plan to connect all these hackerspaces together to make it easier for them to work on big projects and share information with each other.
Think of it like building a big road between all the different hackerspaces, so they can all work together and share their cool ideas. This will help make the world of technology and innovation even better!