The 1940's Wood HI-LO Interlocking Blocks set by Halsam Toy Company in Chicago consists of 18 blocks designed for interlocking play. Made in the United States, these vintage blocks are suitable for various age levels, from young children to adults. With a simple character family of "Block," these classic toy blocks provide hours of entertainment and creative play for all ages. Ideal for collectors or anyone looking to enjoy a nostalgic game from the past, this set is a timeless and durable playtime favorite.