A Great Gift and Interesting Educational Tool!
Newton's Gravity Glass is a sand-filled "hourglass" suspended within a liquid-filled glass cylinder. The sand is a dark blue color making it highly visible. The liquid is an alcohol-water mixture accented with light-catching glitter.
The Gravity glass is an awesome desk-topper and a question-generating eductional tool. When the cylinder is flipped, the sand within the hourglass moves down while the hourglass itself floats up.
The cylinder is made of hand-blown glass. The unit measures 8.75" high x 1.54" in diameter.
Gravity glass comes in blue, purple and red (or choice)
Buy two or more and save 10%