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.

Eudax 82 Pcs Plastic Gear Package Kit Diy Gear Assortment

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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E£ 2935

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Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

DIVERSE GEAR TYPES INCLUDED - From bevel to crown and copper gears, enabling complex mechanical designs.
PRECISION AXLES IN 30 100 MM - Four axle lengths with 2mm shaft diameter for perfect fit and smooth rotation.
COMPLETE 82 PIECE GEAR ARSENAL - Everything you need to build, fix, and innovate your toy cars, robots, and motors.
IDEAL FOR STEM CREATIVE PROJECTS - Boost spatial awareness and engineering skills with hands-on assembly fun.
DURABLE PLASTIC RUBBER COMPONENTS - High-quality materials ensure long-lasting performance and reliability.

The EUDAX 82 pcs Plastic Gear Package Kit offers a comprehensive assortment of gears, axles, wheels, pulleys, bushings, and rubber bands designed for DIY toy cars, robots, and motor projects. Featuring precision axle lengths from 30mm to 100mm and a variety of gear types including crown, bevel, and copper gears, this kit supports complex mechanical builds. Crafted from durable plastic and rubber, it’s perfect for STEM education, hobbyists, and small-scale product design, empowering users to innovate and learn through hands-on assembly.

Specifications

ASIN	B0776ZPP7V
Age Range Description	Kid
Best Sellers Rank	286,321 in Toys & Games ( See Top 100 in Toys & Games ) 33 in Toy Interlocking Gear Sets
Brand Name	EUDAX
Colour	Assorted
Customer Reviews	4.2 4.2 out of 5 stars (445)
Educational Objective	Literacy & Spacial Awareness
Indoor Outdoor Usage	Indoor
Is Assembly Required	Yes
Item Dimensions	14.5 x 8.9 x 2.5 centimetres
Item Weight	68 g
Manufacturer	EUDAX
Manufacturer Part Number	EH-GEAR-82KIT
Manufacturer recommended age	8 years and up
Material Type	Plastic, Rubber
Number of Packs	1
Number of Players	1
Operation Mode	Manual
Power Source	manual winding
Set Name	82-Piece Plastic Gear Accessory Set
Size	S
Subject Character	Robot
Supported Battery Types	No batteries required
Theme	Car,Robot
UPC	756155716883
Unit Count	82.0 count

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