This 26 piece starter set from HABA is suitable for beginner to expert architects ages 1 - 8 years. Contents include: 6 square blocks, 10 rectangular blocks, 4 triangles, 2 bridges, 4 round columns and sturdy fabric carrying tote. Shapes are in standard measurements 1.75" x 1.75" and compatible with all building systems from HABA. For HABA responsibility is written in capital letters. Made of solid, natural, untreated beech wood that comes from sustainable forestry in Germany. Blocks have be proven to help children learn spatial reasoning and help foster a healthy imagination.