The Best Reading . Updated August 12, by Daniel Imperiale.

Date published: -09-30. Rated 4 out of 5 by SAfable from Purchased for School Science Class I am not using the . I bought them to donate to a local school Science class.

durable 3x for kids. Check price at.

These are perfect school supplies to supplements to lesson plans on science and nature study.

Fairly good . Will order again as needed. Date published: -09-02.

The idea for this –in-the-sky comes from a real optical phenomenon known as the Kerr effect or the quadratic electro-optic effect.

Product Dimensions: 8 x 7 x . WEmake brings you an indispensable all-round station with three helping hands. They grip your work securely while accurately positioning them under the for certain applications.