6" lead. Lead free.

This apparatus allows students to study the magnetic fields around a wire.

This Analytical Weight Set contains a total of 9 weights: 1g, (2) 2g, 5g, 10g, (2) 20g, 50g, and 100g. WARNING! CHOKING HAZARD! This product contains small parts. Not for children under 3 years. Adult supervision required.

Young paleontologists will discover the anatomy of a prehistoric monster as they build a 17" dinosaur with this kit.  Ages: 6+

WARNING! CHOKING HAZARD! This product contains small parts. Not for children under 3 years. Adult supervision required.

Was $21.95

This poster presents the Animal Kingdom using the new cladistics classification system. Six newly established phyla / clades have been added plus eleven containing only extinct species. This increased the number of phyla / clades from 27 to 44. They are grouped into the nine primary clades shown and explained in Animal Development Poster, thus the two posters complement each other. 

This all-new edition is an essential reference chart for teachers, students and professionals dealing with both living and prehistoric species.

Laminated, 24" x 36"

This exciting new poster is the first time the animal kingdom has ever been shown through the development of physical characteristics. It graphically demonstrates how the main branches of the new cladistic classification system were established. The poster starts with the simplest animals then progresses to the most complex, showing all of the important changes.

Laminated, 24" x 36"

Demonstrate the thermal-expansion of metals with this simple but visually impressive apparatus.