JASNKKONT via Amazon [amazon.com] has Select Jasnkkont Non-Toxic Sidewalk Jumbo Chalk on sale form $13.49 when you visit the 50% off promo code page to activate [amazon.com]. Shipping is free w/ Prime or on orders $35+.

Note: Amazon promo codes don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.

Available:

• 162-Pack 18-Colors Jumbo Chalk Set [amazon.com] $13.49 w/ visit the 50% off promo code page to activate [amazon.com] (or apply code FB4K7EXY at checkout)
• 180-Pack 20-Colors Jumbo Chalk Set [amazon.com] $13.99 w/ visit the 50% off promo code page to activate [amazon.com] (or apply code X6KA56M2 at checkout)