These cardboard Eclipse glasses are safe for direct solar viewing of solar eclipses, sun spots and other solar phenomenon. The filters in the glasses are optical density 5 or greater and are "CE" certified which meets the transmission requirements of scale 12-16 of EN 169/1992. (Australian standard AS 1338.2 and 1338.3). Lenses are made of exclusive scratch resistant optical density 5, "Black Polymer" material. Eclipse Shades filter out 100% of harmful ultra-violet, 100% of harmful infrared, and 99.999% of intense visible light. These premium filters create a sharper ORANGE colored image of the sun. The backside is printed with information for safe use and warnings about correct usage.
Why not grow your very own stalactite, make baked ice-cream or even an underwater volcano? Have you ever wanted to create invisible ink? 101 Cool Science Experiments will show you how.
101 Cool science experiments will show you how to do things from everyday materials to astound and surprise your friends.
There are one hundred and one of the coolest experiments here for any budding genius.
Ages 7 - 14 up
This annual gem (produced each year since 1991) continues to take the Australian stargazer on a wondrous journey of the night sky. This critically acclaimed work, produced by three well known experts in the field, takes a unique approach to explaining and identifying the Sun, Moon, planets and constellations; it is simply the best publication of its type in the world.
This thermometer allows you to see the temperature by watching the balls sink and float in a beautiful sealed glass cylinder, as their densities are such that they rise or fall as the temperature changes. You can hang this one up as a beautiful display piece.
Measures between 16°C and 32°C