Estes Tandem-X Launch Set

That's a savings of $18 and the best deal we've seen on this comprehensive engine building kit, a great educational tool for enhancing mechanical understanding. Buy Now at Amazon

You can shop LEGO sets that are discounted by as much as 46% in this Walmart Holiday Sale, including Disney kits from $14, Formula 1 from $22, and Star Wars from $24. Some even come with a couple of bucks in Walmart Cash (eligible sets will be marked on the product pages). Shipping is free on all orders over $35 (pickup is also available on most items).  Shop Now at Walmart

Amazon offers a large number of educational toys and games at up to 70% off. We've pictured a Build Your Own Bluetooth Speaker STEM Educational Kit for $13 ($3 off). Shop Now at Amazon

Save on over 50 LEGO sets with prices starting from $4.24. Pictured is LEGO Santa's Sleigh Christmas Toy Set with Reindeer & Santa Figurine for $26 ($14 off). Shop Now at Target

The Amazon Super Saturday sale features last minute gift deals across all categories. There are new discounts on top 100 gifts, stocking stuffers, lightning deals, and more. Check the individual product pages to see if they're expected to arrive by Christmas. Shop Now at Amazon

In this section you'll find some of the best limited-time offers that Amazon has available today. Deals are spread across home, electronics, gifts, and more. Shop Now at Amazon

You can save an extra 20% on everything in this Amazon Resale section at the moment, including big-brand stuff from Keurig, XBox, Philips, and Razer. These items are returns that have been put through a quality check process and graded anywhere from "Used, As Is" to "Like New" condition. Items sold here are backed by Amazon's 30-day return policy.  Shop Now at Amazon

A new Amazon Haul Flash Sale has gone live in which everything costs just a buck or less. Each customer is limited to three items each. Add over $25 to your cart from anywhere in the Amazon Haul section to get free shipping. Buy Now at Amazon