FableForge is an open-source app that generates children's picture books from a single prompt using AI technology. It combines GPT-3.5/4 for text generation, OpenAI's function calling feature to generate Stable Diffusion prompts, and Deep Lake for storing generated images and text pairs. The app uses LangChain to interact with OpenAI's large language models and has a Streamlit UI for users to input prompts and download their generated books. FableForge demonstrates how new AI tools can be leveraged to overcome hurdles in content creation, and Deep Lake provides valuable data storage and analysis capabilities for finetuning generative AI models.