Erector Set is a term that refers to a specific brand of metal construction toy, which has been in production since 1913. The pieces in an erector set can be connected in a variety of ways using nuts, bolts, and other fasteners. While "Erector Set" is a trademarked term, there are other words that can be used to describe similar toys, including construction sets, building sets, and mechanical sets. These toys are great for children who enjoy hands-on activities and developing their problem-solving skills, as they can spend hours constructing and creating their own designs using the pieces in the set.