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juguetes científicos micro bank alcancía $295.00 $295.00 you won t believe your eyes coins pass through the micro-funnel only to emerge in the special inner bank magically miniaturized transparent face allows you to match savings add up can you solve the mystery of the shrinking coins advanced optical engineering in the microbank will leave you guessing makes a great gift or a desk toy features appears to shrink coins inserted see your savings through transparent facade have fun trying to figure out why coins shrink excellent desk toy box size 4.75in 12.07cm x 3.25in 8.26cm x

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ceramic horseshoe magnet $95.00 product 10150

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windmill generator kit $495.00 product 12260

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spinning top generator kit $495.00 product 12558 original slinky $195.00

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product 12528

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extreme metal puzzle $195.00 product 13540

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mini newton s cradle $195.00 product 13588

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national geographictm roto rocket $795.00 pesos

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stunt top $495.00 old world kaleidoscope $395 product 10435

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the original superball $145 product 12938 wood ball blower $145 product 11196 isoflex ball $145 product 12255

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tangle jr classic $195 product 12670

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ufo solar balloon $295.00 gratis en la compra de mas de $700 pesos in a world where fossil fuels are constantly on the brain it s time to keep solar energy in mind.the ufo solar balloon is the intensely fun educational toy that is powered by the sun fill the ufo solar balloon with air attach the line and watch it magically rise bright direct sunlight warms it in a few minutes and it soars but how does it work a solar balloon is a balloon that is filled with air and gains buoyancy because the air inside the balloon has been heated by radiation from the sun the black balloon material absorbs the heat of the sun s rays causing the air inside the balloon to expand and reduce in density compared to the air outside of the balloon giving it buoyancy this balloon functions just like a hot air balloon with the sun acting as the heat source solar balloons have been proposed for exploration on the planet mars as well as many other scientific uses the ufo solar balloon makes an excellent gift for young and old alike this educational toy is great for summer fun in the sun an awesome stocking stuffer and even a winning science project includes solar balloon expands to 10 feet long x 2 feet diameter 60 feet of string instruction sheet warning not intended as a toy for children operation requires adult supervision box size 10.50in 26.67cm x 6.00in 15.24cm x 1.00in 2.54cm recommended for ages 8 and older weight 0 lb 4 oz 0.11 kg

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art bank alcancía avión $295.00 a silver plane appears to be suspended in mid air inside this box drop your coins through the slot in the top and they completely disappear only those in the know can open the secret door and retrieve the money an ingenious optical illusion and an elegant way to store your spare coins the disappearing coin bank is 7x7x7cm.

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mysterious rattleback $195.00 this is one of the simplest and coolest physics toys it will behave differently when you spin it clockwise or counterclockwise cool desk toy or a gift the shape of this toy is very curious and it produces an unexpected effect when you spin it this toy is also known as a rattleback or a space toy features cool toy with mysterious spinreversal motion behaves in seemingly opposite ways when spun clockwise versus counter-clockwise excellent for physics demonstrations or as an intersesting desk toy more about rattlebacks a rattleback is a semi-ellipsoidal top which will spin on its axis in a preferred direction but if spun in the opposite direction it becomes unstable rattles stops and reverses its spin to the preferred direction this spin-reversal motion seems at first sight to violate the angular-momentum conservation law of physics moreover for most rattlebacks the motion will happen when the rattleback is spun in one direction but not when spun in the other some exceptional rattlebacks will reverse when spun in either direction this makes the rattleback a physical curiosity that has excited human imagination since prehistorical times for more info on rattlebacks go to:http en.wikipedia.org/wiki/rattleback box size 7.00in 17.78cm x 6.00in 15.24cm x 1.00in 2.54cm recommended for ages 8 and older weight 0 lb 2 oz 0.05 kg

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art bank alcancía cubo $295.00 a shiny cube appears to be suspended in mid air inside this box drop your coins through the slot in the top and they completely disappear only those in the know can open the secret door and retrieve the money an ingenious optical illusion and an elegant way to store your spare coins the radiometer provides an introduction to the study of thermodynamics that sits on your desk or table top set it in sunlight or incandescent light and watch the mill inside spin the radiometer consists of four vanes each has one blackened side and one silvered side it is encased in a clear glass bulb that has a near perfect vacuum so what happens to make the radiometer work crookes originally believed that sunlight falling on the light-mill turned the vanes so that the black surfaces were being pushed away by the light he thought that this demonstrated that light radiation pressure on the black vanes was turning it round just like water in a water mill.

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