Aerodynamics are rich in knowledge of physics, single cylinder combustion engine. Engine principle is intuitive, educational toys, teaching experimental equipment caneffectively cultivate children's interest in learning can also be used for classroomteaching, more intuitive & easy to underst&. Description: Name: Double Cylinder Engine Model
Material: Aluminum alloy, glass
Colour: Silver gold
Size:160x 87x 110mm Instructions:-The engine model on the horizontal position by hand toggle the flywheel to see if smooth, check the connection rod is normal, whether the cylinder oil & dust, & if so, please use toilet paper to erase Not smooth. Toggle the flywheel feel pressure rebound within the cylinder body is a normal phenomenon, the cylinder is sealed.-The packing bag of alcohol lamp cotton wear into the metal cap lamp.-Please go to the pharmacy to buy 95% purity alcohol, anhydrous industrial alcohol better. Fill the alcohol lamp to less than two-thirds.-Alcohol lamp to the alcohol lamp, at the premise of ensuring safety, ignite the alcohol lamp about 2 minutes after the flywheel, until the flywheel automatic operation so far, the whole process of heating, hands may not touch.-Led lights can be directly into the generator output interface, if not inserted, the exchange can be positive & negative, led a long foot for the cathode. Note:-This engine is perfectly for kids over 12 years old.-There will be the operation of steam, when the steam too much, the engine will stop working, inside and


...

Description: Dimension: Approx.15*11.5*15cm (Lx Wx H) Weight: 308g
Colour: As the picture
Material: Plastic

...

Only US$11.99, buy best stem scientific experiment hand generator technology science toy sale online store at wholesale price. ...

Small Size Newtons Cradle Steel Balance Ball Physics Pendulum Feature: The set of balance balls is particularly suitable for the place such as office, desk table, computer table etc. It is a best & useful gift for children to arouse his/her interest in physics. Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum & Energy. Friction & damping effects are also observed. Pull up one ball & release, only one ball in the other side moves, pull up two, two balls will react, & so on. When you are sleepless, just move your eyes with the bump of the ball, then you may slowly, slowly falling asleep. Watching the bump of the ball is a special way to pass the dull hours.
Material: Solid steel ball, Nylon plumb line, ABS plastic frames & base.
Colour: The base is Claret-red, the rest are Silver. Description: Dimension: Approx.9x 7.5x 9.5CM (Lx Wx H) Weight: 79g
Colour: As the picture
Material: Plastic & Nylon Package Included:1 x Newtons Cradle Balance Balls Desk Toy



...

Description:
Material: Steel, copper & Aluminium Weight: 600g
Colour: silver

Features:-Using



...

Description:
Size:17*17*20CMDiameter of the ball: 12cm Weight: About 365g Aperfectdecorationforhomes, parties, cafe,
...

Description: Brand: ZT Model Item Name:STEARMAN Rubber Band Powered Aircraft
Size: 45*33*12cm Power: Rubber Band Powered
...

Harness Feature:1. Plugs into Harness at radio.2. Power 4 speakers.3. Heat resistant for lasting a lifetime.4. Allows installation of aftermarket radio using factory wiring & connector.5. High quality ABS plastic molded connector for the perfect fit.6. Pre-stripped to make installation quick & easy.7. No cutting of factory wiring needed. Antenna Feature:1. Antenna Adapter to Aftermarket Radio 2. Use when replacing factory radio 3. Quick & Easy Installation 4. Quality crafted to factorys rigid specification 5. Also same as Metra 40-HD10/ Best Kits HO-6/ Scosche HAABSpecification:
Material: ABS Plastic Antenna Adapter Length: Approx.25.5cm Harness Length: 14.5cm Connections guide: Yellow 12V Constant Red 12V Accessory Black
- Ground Orange Dash Light Dimmer/ Illumination Green Lt Rear Speaker (+) Green with Black Stripe Lt Rear Speaker (-) White Lt Front Speaker (+) White with Black Stripe Lt Front Speaker (-)violet Rt Rear Speaker (+)violet with Black Stripe Rt Rear Speaker (-) Gray Rt Front Speaker (+) Gray with Black Stripe Rt Front Speaker (-) Fitment: For Honda 1997-1999 CLFor Honda 1986-1998 Integra For Honda 1986-1996 Legend For Honda 1991-1996 NSXFor Honda 1996-1998 RLFor Honda 1996-1998 TLFor Honda 1992-1994 Vigor For Honda 2006-2011 Civic (Excludind DX model) For Honda 2007-2011 CR-VFor Honda 2007-2010 Odyssey For Honda 2007-2010 Fit Package Included:1 X Harness 1 X Antenna Adapter

...

Features:-Ideal for business or home-Modern design style.-Convenient for you to use hot & humid towels-UV can

...

Only US$9.21, shop sterilizer lamp uv + ozone double disinfection light home ultraviolet light smart bulb uv germicidal lamp ozone sterilization lamp at Banggood.com. Buy fashion skin disinfection nursing online. ...