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displaying 51 - 52 of 52 lessons
| title | description | rating | updated | author | |
|---|---|---|---|---|---|
| The Thaumatrope |
This lesson contains plans and materials for constructing a thaumatrope, a Victorian era animation toy that blends two images together by making use of human persistence of vision. All that's needed is an index card and some string. |
(3 votes) |
23-Oct-2013 | guy |
 |
| Super Absorbent Polymers - Diapers and Instant Snow |
Superabsorbent polymers (SAP's) are used to absorb and retain liquid in a variety of applications, including baby diapers and potting soil. One common SAP, known commercially as "instant snow", is sold as a white powder that can absorb several hundred times its weight in... |
(23 votes) |
23-Oct-2013 | guy |
 |