NiMo (Nets In Motion) is a Graphic-Functional-Data Flow language designed to visualize algorithms and their execution in an understandable way. Programs are process networks that evolve showing the full state at each execution step. Processes are polymorphic, higher order and have multiple outputs. The language has a set of primitive processes well suited for stream programming and supports open programs and interactive debugging. The new version of the environment NiMo Toons includes: an also graphic and incremental type inference system, multiple output processes as higher order parameters, symbolic execution, five evaluation modes that can be globally or locally set for each process and dynamically changed, and facilities to measure the used resources (parallelism level, number of steps, number of processes, etc.)