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Stem Model Engine DIY | Pulse Generator 7.83Hz Schumann Wave Generator Ultra Low-Frequency Pulse With Acoustic Version For Helping Sleep - EnginediyStem Model Engine DIY | Pulse Generator 7.83Hz Schumann Wave Generator Ultra Low-Frequency Pulse With Acoustic Version For Helping Sleep - Enginediy
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Experiment Model

Stem Model Engine DIY | Pulse Generator 7.83Hz Schumann Wave Generator Ultra Low-Frequency Pulse With Acoustic Version For Helping Sleep – Enginediy

$51.67
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Stem Model Engine DIY | Stark 5V Mini High Speed Hall Brushless Motor Usb Interface Hall Sensor Drives Dc Motor Scientific Experiments ToolStem Model Engine DIY | Stark 5V Mini High Speed Hall Brushless Motor Usb Interface Hall Sensor Drives Dc Motor Scientific Experiments Tool
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Experiment Model

Stem Model Engine DIY | Stark 5V Mini High Speed Hall Brushless Motor Usb Interface Hall Sensor Drives Dc Motor Scientific Experiments Tool

$24.39
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Stem Model Engine DIY | Steam Boiler For Steam Engine ModelStem Model Engine DIY | Steam Boiler For Steam Engine Model
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Stem Model Engine DIY | Steam Boiler For Steam Engine Model

$30.59
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Stem Model Engine DIY | Stirling Engine Kit Free Piston Stirling Engine Model Science Experiment Kit - EnginediyStem Model Engine DIY | Stirling Engine Kit Free Piston Stirling Engine Model Science Experiment Kit - Enginediy
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Stem Model Engine DIY | Stirling Engine Kit Free Piston Stirling Engine Model Science Experiment Kit – Enginediy

$37.39
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Stem Model Engine DIY | Stirling Engine Model Car Driving Science Experiment Kid Gift Collection EnginediyStem Model Engine DIY | Stirling Engine Model Car Driving Science Experiment Kid Gift Collection Enginediy
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Experiment Model

Stem Model Engine DIY | Stirling Engine Model Car Driving Science Experiment Kid Gift Collection Enginediy

$31.04
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Stem Model Engine DIY | Stirling Engine Model With Led Metal Science Experiment KitStem Model Engine DIY | Stirling Engine Model With Led Metal Science Experiment Kit
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Experiment Model

Stem Model Engine DIY | Stirling Engine Model With Led Metal Science Experiment Kit

$35.19
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Stem Model Engine DIY | Stirling Engine With Generator And Bulb Stirling Motor Model Science ToyStem Model Engine DIY | Stirling Engine With Generator And Bulb Stirling Motor Model Science Toy
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Experiment Model

Stem Model Engine DIY | Stirling Engine With Generator And Bulb Stirling Motor Model Science Toy

$25.99
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Stem Model Engine DIY | Two-Cylinder Stirling Engine Model With Led Metal Generator External Combustion Engine ModelStem Model Engine DIY | Two-Cylinder Stirling Engine Model With Led Metal Generator External Combustion Engine Model
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Experiment Model

Stem Model Engine DIY | Two-Cylinder Stirling Engine Model With Led Metal Generator External Combustion Engine Model

$51.19
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Stem Model Engine DIY | V8 Engine Model - Chevrolet Corvette V8 Mini Engine Model - Science Experiment Stem Toy For Gift Collection 1: 6 Engine - EnginediyStem Model Engine DIY | V8 Engine Model - Chevrolet Corvette V8 Mini Engine Model - Science Experiment Stem Toy For Gift Collection 1: 6 Engine - Enginediy
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Experiment Model

Stem Model Engine DIY | V8 Engine Model – Chevrolet Corvette V8 Mini Engine Model – Science Experiment Stem Toy For Gift Collection 1: 6 Engine – Enginediy

$78.99
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Stem Model Engine DIY | V8 Engine Model Kit - Build Your Own V8 Engine Cooling Fan - V8 Engine Hood Fan Radiator For Traxxas Trx4Stem Model Engine DIY | V8 Engine Model Kit - Build Your Own V8 Engine Cooling Fan - V8 Engine Hood Fan Radiator For Traxxas Trx4
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Stem Model Engine DIY | V8 Engine Model Kit – Build Your Own V8 Engine Cooling Fan – V8 Engine Hood Fan Radiator For Traxxas Trx4

$30.59
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Stem Model enginediy | 10Cm Electronic Music Tesla Coil Artificial Lightning Hand Touch Magnetic Storm Coil Experimenting Device Teaching Tool Desktop ToyStem Model enginediy | 10Cm Electronic Music Tesla Coil Artificial Lightning Hand Touch Magnetic Storm Coil Experimenting Device Teaching Tool Desktop Toy
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Experiment Model

Stem Model enginediy | 10Cm Electronic Music Tesla Coil Artificial Lightning Hand Touch Magnetic Storm Coil Experimenting Device Teaching Tool Desktop Toy

$38.39
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Stem Model enginediy | 10Cm Electronic Music Tesla Coil Bluetooth Artificial Lightning Hand Touch Magnetic Storm Coil Experimenting Device Toy Desktop TypeStem Model enginediy | 10Cm Electronic Music Tesla Coil Bluetooth Artificial Lightning Hand Touch Magnetic Storm Coil Experimenting Device Toy Desktop Type
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Experiment Model

Stem Model enginediy | 10Cm Electronic Music Tesla Coil Bluetooth Artificial Lightning Hand Touch Magnetic Storm Coil Experimenting Device Toy Desktop Type

$38.39