Start with the basic Cube Den Module shown and add trellis, fence and planter modules as you go for the complete 4 part unit. Up to 80% recycled British waste plastic HDPE sheet material is very hard wearing and should last for many generations of children. Easy to clean with jet spray or normal household cleaners. Hygienic and non-absorbent. Colours UV protected against fading. Very long life compared to wooden play dens. Supplied flat packed.