Knex Sale – Dinosaurs Building Set only $17 shipped! Great Christmas Gift idea!August 22, 2012 by SMFM Leave a CommentKnex Sale- If you have a child who likes K’nex here is a Groupon you may want to grab! You can get theÂ Kâ€™Nex dinosaurs building setÂ from Groupon which is only $14 + $3 shipping.Great gift to put away for Christmas !!!Check out the Knex Sale Here!