Ai2 released ToyBlocks on November 6, 2026, as the first environment in its FoundationWorlds framework, pairing an open robot simulation with generated demonstrations, two trained models and evaluation tools. The framework is designed to make robot-learning experiments repeatable and failures easier to trace. The setting puts a simulated arm and labeled blocks on a tabletop. Pushing, flipping and stacking are joined by search, sorting and arrangement tasks: a block’s needed letter or picture…