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10 bestStem Machinesof December 2025

112M consumers helped this year.

32% off

1

LEGO® Gear Bots
LEGO® Gear Bots

Klutz

9.9

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23% off

2

Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings - Turn Rough Rocks into Beautiful Gems : Great Science & STEM Gift for Kids All Ages : Geology Toy
Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings - Turn Rough Rocks into Beautiful Gems : Great Science & STEM Gift for Kids All Ages : Geology Toy

Dan&Darci

9.8

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21% off

3

KomeStone K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit,Extra Large 2.5 Lb Barrel with 3-Speed Motor 9-Day Timer,6 Belts,Rough Gemstones 4 Polishing Grits etc.
KomeStone K1 Pro Professional Cutting-Edge Brushless Motor Advanced Rock Tumbler Polisher Kit,Extra Large 2.5 Lb Barrel with 3-Speed Motor 9-Day Timer,6 Belts,Rough Gemstones 4 Polishing Grits etc.

KomeStone

9.7

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4

TENS Unit Muscle Stimulator Pro for Back Pain Relief, Shoulder Recovery and Physical Therapy, Electronic EMS Massager Machine with PMS Pulse for Effective Shock Therapy, Red
TENS Unit Muscle Stimulator Pro for Back Pain Relief, Shoulder Recovery and Physical Therapy, Electronic EMS Massager Machine with PMS Pulse for Effective Shock Therapy, Red

Neocarbon

9.5

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5

NATIONAL GEOGRAPHIC Magnetic Marble Run - 75-Piece STEM Building Set for Kids & Adults with Magnetic Track & Trick Pieces & Marbles for Building A Marble Maze On Any Magnetic Surface
NATIONAL GEOGRAPHIC Magnetic Marble Run - 75-Piece STEM Building Set for Kids & Adults with Magnetic Track & Trick Pieces & Marbles for Building A Marble Maze On Any Magnetic Surface

Blue Marble

9.3

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Paint Spin Art Machine Kit for Kids - Arts and Crafts for Boys & Girls Ages 6-8 - Art Craft Set Easter Gifts for 6-9+ Year Old Boy, Girl- Cool Painting Spinner Toys Kits Sets - Birthday Gift Ideas 6 7 8 9

Paint Spin Art Machine Kit for Kids - Arts and Crafts for Boys & Girls Ages 6-8 - Art Craft Set Easter Gifts for 6-9+ Year Old Boy, Girl- Cool Painting Spinner Toys Kits Sets - Birthday Gift Ideas 6 7 8 9

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Rechargeable TENS Machine: Easy@Home Electric Muscle Stimulator Unit - EMS Pulse Massager for Pain Therapy & Muscle Relief - Dual Channel 24 Modes 16 Pads EHE020

Rechargeable TENS Machine: Easy@Home Electric Muscle Stimulator Unit - EMS Pulse Massager for Pain Therapy & Muscle Relief - Dual Channel 24 Modes 16 Pads EHE020

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AUVON Rechargeable TENS Machine, 24 Modes 4th Gen TENS Unit Muscle Stimulator with 8pcs 2"x2" Premium Electrode Pads for Pain Relief, Back Pain, Neck Pain, Muscle Pain

AUVON Rechargeable TENS Machine, 24 Modes 4th Gen TENS Unit Muscle Stimulator with 8pcs 2"x2" Premium Electrode Pads for Pain Relief, Back Pain, Neck Pain, Muscle Pain

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Twin Stim TENS Machine and EMS Muscle Stimulator - TENS Unit for Back Pain Relief, Lower Back Pain Relief, Neck Pain, Stim Machine

Twin Stim TENS Machine and EMS Muscle Stimulator - TENS Unit for Back Pain Relief, Lower Back Pain Relief, Neck Pain, Stim Machine

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29% off

6

AUVON Dual Channel TENS Machine with 20 Modes, TENS Unit Muscle Stimulator with 2" and 2"x4" TENS Unit Electrode Pads for Back Pain, General Pain Relief, Neck Pain, Muscle Pain
AUVON Dual Channel TENS Machine with 20 Modes, TENS Unit Muscle Stimulator with 2" and 2"x4" TENS Unit Electrode Pads for Back Pain, General Pain Relief, Neck Pain, Muscle Pain

AUVON

9.1

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7

TENS 7000 Digital TENS Machine - for Back Pain, Neck Pain, General Pain Relief, Sciatica Pain Relief, Muscle Pain Relief
TENS 7000 Digital TENS Machine - for Back Pain, Neck Pain, General Pain Relief, Sciatica Pain Relief, Muscle Pain Relief

TENS 7000

8.9

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31% off

8

Makeblock mBot STEM Projects for Kids Ages 8-12, Coding Robot Kit Learning & Education Robot Toys Gift for Boys and Girls to Learn Robotics, Electronics and Scratch Arduino Programming While Playing
Makeblock mBot STEM Projects for Kids Ages 8-12, Coding Robot Kit Learning & Education Robot Toys Gift for Boys and Girls to Learn Robotics, Electronics and Scratch Arduino Programming While Playing

Makeblock

8.7

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9

STEM Science Kits for Kids 6-8, Educational Toys for Kids 4-6-8, Kids Stem Robot Toys Electronic Science Experiments Engineering Building Kit Birthday Gifts, Toys 6 7 8 9 10 11 12 Year Old Boys Girls
STEM Science Kits for Kids 6-8, Educational Toys for Kids 4-6-8, Kids Stem Robot Toys Electronic Science Experiments Engineering Building Kit Birthday Gifts, Toys 6 7 8 9 10 11 12 Year Old Boys Girls

Tsomtto

8.4

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10

National Geographic Marble Run with Motorized Elevator - 150-Piece Marble Maze Kit with Motorized Spiral Lift, 30 Marbles, Storage Bag & More, Perpetual Motion Machine, Marble Game, Kids Physics Toys
National Geographic Marble Run with Motorized Elevator - 150-Piece Marble Maze Kit with Motorized Spiral Lift, 30 Marbles, Storage Bag & More, Perpetual Motion Machine, Marble Game, Kids Physics Toys

Blue Marble

8.2

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