Shape Stacker (Premium) (Made in USA) (Age 1 & Up) - Unpainted Radioactive One straight-forward set of instructions

One straight-forward set of instructions to perform the levitation

Leave it by a window on a sunny day

Ferrofluid was invented by NASA in 1963 (using rocket fuel as the liquid) as a way of ensuring that the rocket fuel otherwise "floating around" inside a tank in a weightless environment could be drawn toward a pump inlet by applying a magnetic field

Pascal's Principle

Shape Stacker (Premium) (Made in USA) (Age 1 & Up) - Unpainted Radioactive One straight-forward set of instructionsExtremely well made and using six different geometric shapes, this gorgeous Shape Stacker introduces 4 key educational concepts for your baby: Shapes Triangle, Square, Pentagon, Hexagon, Octagon, and Circle Shape Names the English name of the shape is clearly engraved on each shape Number of Sides the number of sides are clearly numbered on each shape Patterning the design encourages sorting from smallest to largest size The stacker also helps young