The Neo4j GraphQL Toolbox is a user interface that allows users to write and execute GraphQL queries and mutations against their Neo4j database with minimal setup, making it easier for new users to get started with GraphQL. The toolbox includes features such as auto-generated type definitions based on the data in the Neo4j graph database, a built-in GraphQL query builder, and a server setup guide. It is built using Typescript and React, and is open-source, allowing users to provide feedback and feature requests. The tool is designed to help users explore and try out GraphQL with Neo4j quickly, and can eventually be used to build powerful GraphQL APIs.