Designed with some of our youngest builders in mind (but great for all ages 18 months+), each chunky block is a full unit thick (1-3/8") making it very stable for stacking and to stand on end. Like all Everwood Friends™ blocks, every edge is rounded and every surface is sanded buttery smooth. Kids and grown-ups love handling these adorable blocks and combining them to create unique buildings for their own Little Town!