Litmus paper is a crucial supply for any laboratory, and is used in classrooms of all grade levels. These one hundred blue strips of litmus paper can be used to determine the pH category of a substance. By way of a mixture of dyes extracted from lichens, they tell you whether the substance is acidic or basic. If the substance is a base, the paper remains blue. If the substance is acidic, the paper will shift its color to red, allowing you to know whether you’re dealing with an acid or a base in your experiments. The paper will also turn purple in the presence of a neutral substance. A highly useful tool for basic chemistry.
Great reference card for chemistry and physics students.
Build a tumbling robot that gets up right after it has fallen down, without any outside help!
Get swept away by this fantastic robot kit that uses vibrations to move!
Find the hidden crystals when you open your own geodes from this fun set.
This beautiful candle holder is carved out of natural amethyst!
This kit includes several different projects that demonstrate the power of magnets!