tent must be robust and really waterproof (particularly in Polish conditions). For a family trip with a small child better suited to large, traditional tents than the small igloo-shaped namiociki - you can stand in them, to dress comfortably, is a lot of storage space. This is useful vestibule (when traveling with children, there is always lots of things). The floor can be a thin foam wyścielić (for example, that we sold in supermarkets under the building floor panels) - it will be warmer.
