Search results for Model Construction Sets are below:

http://www.knex.com/

K’NEX prides itself on connecting Science, Technology, Engineering, Arts, and Math with imagination. STEAMagination™ can be found in every K’NEX set and with it building dreams become a fun-powered, 3-D reality! Winner of over 390 awards and recognitions, the K’NEX product line has building toys specially designed for every age group and skill level. -K'NEX

K'NEX rods and connectors are manufactured at an eco-friendly manufacturing facility in Pennsylvania, The Rodon Group. While most toys are made overseas, K’NEX remains committed to American design and manufacturing. -K'NEX