Today Only, Amazon’s Gold Box Deal of the Day: Save 50% on Select K’NEX Toys! You can take advantage of FREE Super Saver Shipping or FREE 2-Day shipping with a Prime Membership. There is an entire page of different options but here are a few you might be interested:
K’NEX Build A Bunch – $10 (down from $24.99)
K’NEX Robo Strike Building Set – $8 (down from $15.99)
These are just a few I like but go here to get the rest of the options!