25-in-1 Engineering Kit Toys Set, 577pcs 60% Off with Promo Code! Posted on February 27, 2024 | by admin Amazon.com has this 25-in-1 Engineering Kit Toys Set, 577pcs for 60% off when using Promo Code 50LNREZQ + 10% Off Coupon until 02/29/2024 11:59PM PDT or while supplies last.