what is the module of these gears?

I don't know. It is not printed on the gears anywhere and I cant honestly see well enough right now to count the teeth. their pretty small. so I don't know.

The promotional codes 5fmsmqp8 and 9l4wnv7 didn't work as i tried them, and none made any differences at all! why? will you fix the issues?

I feel this question is either for Amazon or the supplier, I don’t think I could help.

do you have suggested things you could make w/ these for 7 year old ?

My 7 year old and I made a car using posicle sticks and a glue gun in addition to the kit. Since the gears are so small the tollerance for placing them correctly is pretty tight. My 7 year old wasn't able to line up the axle holes by himself and still have the gears mesh. With adult help and immagination you could make all kinds of contraptions.

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EUDAX 82 pcs Plastic Gear Package Kit - DIY Gear Assortment Accessories Set for Toy Motor Car Robot Various Axle Belt Bushings

Product ID: 52618660

📏Axles in 4 lengths (30-100mm)

🔧Multi-functional DIY kit

⚙️82 precision gear pieces

5.98 OMR

Duties & taxes included

In stock

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Description

⚙️ Unlock your inner engineer with the ultimate DIY gear kit!

DIVERSE GEAR TYPES - Includes crown, bevel, copper, rack, pulley, and rubber bands to power up any creative project.
VERSATILE AXLE SIZES - Four axle lengths (30, 50, 70, 100mm) with consistent 2mm shaft diameter for perfect fit and flexibility.
PRECISION ENGINEERING - Tight and loose 2mm apertures plus specialty sizes ensure smooth, reliable mechanical motion.
IDEAL FOR MAKERS INNOVATORS - Perfect for DIY science, small production, and product design—join the community of forward-thinking creators.
COMPLETE 82 PIECE GEAR ARSENAL - Everything you need to build, fix, and innovate your toy cars, robots, and mechanical models.

The EUDAX 82 pcs Plastic Gear Package Kit offers a comprehensive assortment of gears, axles, wheels, pulleys, and rubber bands designed for DIY toy cars, robots, and mechanical models. Featuring multiple axle lengths and diverse gear types with precise apertures, this kit supports versatile, hands-on creativity and small-scale production projects without the need for batteries.

Specifications

ASIN	B0776ZPP7V
Age Range Description	Kid
Best Sellers Rank	#94,724 in Toys & Games ( See Top 100 in Toys & Games ) #23 in Toy Interlocking Gear Sets
Brand Name	EUDAX
Color	Assorted
Customer Reviews	4.3 4.3 out of 5 stars (460)
Educational Objective	Color Recognition
Indoor Outdoor Usage	Indoor
Item Dimensions	5.7 x 3.5 x 1 inches
Item Weight	2.4 ounces
Manufacturer	EUDAX
Manufacturer Part Number	EH-GEAR-82KIT
Material Type	Plastic, Rubber
Number of Players	1
Operation Mode	Manual
Power Source	Manual
Set Name	82-Piece Plastic Gear Accessory Set
Size	Small
Subject Character	Robot
Supported Battery Types	No batteries required
Theme	Car,Robot
UPC	756155716883
Unit Count	82 Count

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