pH paper is used to measure the acidity or base of substances. It is measured on a scale of 1 to 14; 1 being most acidic, 14 being most base, and 7 being perfectly neutral. There are many household items which can be measured. For example, lemon juice is an acid, whereas kitchen soap is a base. Have fun testing other substances with this small vial consisting of approximately 100 pH paper strips and a color-coded pH range chart. Great for use at home, in science projects, in the classroom or at the lab, there’s plenty of paper to go around, and countless experiments to conduct!
A touch of joy. A touch of science. Light responds to your touch and to the music in your room!
Make a crazy robot that walks like a silly ducky!
The large realistic model has removable organs that can be studied and set back into the correct position.
The Duncan Phoenix Diabolo features a stable, hard rubber shell that retains its shape.
The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.
Perplexus is a bendy, trendy, can't-put-it-down challenge!