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.
This is a classic demonstration toy of the powers of magnetic fields!
Build over 100 exciting electronic projects with this easy to use kit!
Get this great introductory chemistry kit for your favorite young scientist!
Is it a demonstration of a scientific law or a work of art?
See the constellations visible in the Northern Hemisphere on this watch!
Learn how solar cells transform light into electrical energy with this great kit!