Sand hourglasses are a unique and elegant way to tell time. Keep one in your home, office, or classroom, for decorative or practical purposes; this hourglass bridges the gap between the two, and makes for an excellent conversation piece or gift. Parents can use it at home as a method for visibly demonstrating the passage of time for young children. Free-standing sand timer measures 5.5 inches in height and measures approximately 10 minutes.
Comprehensive collection of 30 fossils.
Build a magnetic levitating train with this science fair project kit!
Get this great introductory chemistry kit for your favorite young scientist!
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
This illuminated orbiter is great for demonstrations in the astronomy classroom!
Easily assemble a working alarm motion detector!