Providing information about contemporary water resources dynamics for local communities is the one of the major goal for modern hydrology. Tons of scientific papers and engineering reports published each year, but only tiny part of them communicated with society. In this study we present hydrological modelling playground (LHMP) for large Arctic domain. LHMP includes three state-of-art lumped conceptual models for daily runoff predictions, single snow model, required meteorological forcing data, routines for data processing, and set of interfaces (playgrounds) for interaction with results. Playground modules are written in Python programming language and freely available on Github (www.github.com/hydrogo/LHMP).