September 5, 2026

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One of the first toys many kids play with is a toy car, with Hot Wheels, racing video games, and even Lego McLaren or Lamborghini to follow as they grow up. As fun as they are to play with, they aren’t all that educational when it comes to teaching kids how cars actually work. For that, you need a model engine kit like the one that’s on sale at Macy’s right now.

The Discovery #Mindblown Model Engine Kit is on sale for $31 at Macy’s, 60% less than its list price of $78. It’s also part of a buy one get one promotion, so you can snag a second set for a friend or family member’s kid at no additional cost. This toy is recommended for ages 8 and older, and not just for safety reasons. It’s a complex, multifaceted toy that appeals to lots of kids’ natural interests and tendencies, from building to mechanics to the real-world connection of understanding what’s happening under mom and dad’s hood.

This kit is a build-it-yourself miniature replica of a four-cycle internal combustion gasoline car engine. It includes 104 parts, all of the various valves, cylinders, cranks, and pistons you’d find in a real engine, with gasoline swapped out as a fuel source in favor of a battery pack distributor. Once assembled, kids can peer into the transparent model to see a rotating fan and belt, spark plugs lighting up, pumping pistons, turning crankshaft, and more in a nicely sized model that’s 15 inches long, just over a foot tall, and 3.5 inches deep. 

Related: Amazon Is Selling a ‘Quality’ Mini V8 Engine Kit for 30% Off, and Shoppers Say It’s ‘Educational and Fun’

One shopper wrote that “putting together this real life model engine from scratch was such a fun and immersive experience.” The completed engine is “incredible to look at” and kids will “watch in awe as the motor spun and whirled.” Their son “has become enthralled with building engines as a result of this model kit,” which definitely qualifies as “fun for the whole family.”

Another satisfied customer wrote that “this little engine has been so fun to put together” and “it has every piece that a real engine has.” That makes it “wonderful for anybody that wants to build actual engines.” 

Deals We’re Loving

The Discovery #Mindblown Model Engine Kit is fun to build and fun to play with, a two-for-one appeal that makes its current $31 sale price even more of a bargain. This price will last until April 6, but there’s no guarantee supplies will, so we’d recommend snagging one for your junior gearhead ASAP.

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