K'Nex Building Sets are up to 60% off right now through Amazon's Daily Deals!
There are multiple sets that are regularly priced at $39.99 but are on sale for $15.99 and $16.99 at Amazon.com HERE!
AND, shipping is FREE if you have Amazon Prime or your order is $49 or more.
See all the details on Amazon.com.
Smart Spending Resources is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.