Children ages 3 and up can experience a nature-inspired tactile building experience indoors and outdoors with Big Branch Block Builders - 125 piece set. Real branches in various lengths feature notched sides for perpendicularly stacked builds. Special parts create window frame and roof details. The unrefined wood and real branch material wears over time revealing cause and effect behaviours and natural evolution to children. Authentic marks spots and imperfections in the wood pieces provide a natural appearance that strengthens organic connections to nature during play. Additional loose parts not included.Includes:10 double-sided concept cards enhance hands-on building activities by providing creative inspiration and real-life examples. Shortest branch measures 57.15mm longest branch measures 349.25mmNote: Not suitable to be stored outdoors Age suitability: 3 Years+