This highly detailed engine model is perfect for any technology, physics or general science class! Four-stroke operation is demonstrated by the gear-driven timing mechanisms, valves, ignition systems and more. DC power input is available to power a lamp which represents the spark or glow plug ignition. This model is the gasoline version. Made from a high-density plastic that will withstand continual use.
Ever wonder how to survive in the wilderness? These cards can help!
NEW 2016 DESIGN! This hip red tee features Pi to 1000 decimal places on an ultra soft 100% cotton shirt.
This 1mW, 532nm Super Safe Green Laser Pointer is for education, government or other settings where safety is a concern.
This great rock tumbling kit comes with everything you need to polish stones and gems!
Build over 100 exciting electronic projects with this easy to use kit!
Explore the wonders of wind power with this amazing kit!