Versa Bricks: Connecting LEGO®, HOT WHEELS®, K'NEX®, Trains by Jerry Schutt — Kickstarter
Lego Knex Mixed Lot Toys and some unknown pieces preowned and Lego Technic | eBay
STEM: Young engineers- Lego and K'Nex after school clubs | Our Lady of Lourdes PS
Free 3D Printable Adapters Allow Kids To Connect Legos, K'Nex, Tinkertoys and 7 Other Construction Sets - 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing
K'Nex Robotics Review - Build and Program Big Robots! | Tech Age Kids | Technology for Children
Amazon.com: K'NEX Beasts Alive – K'NEXosaurus Rex Building Set – 255 Pieces – Ages 7+ Engineering Educational Toy : Everything Else