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Transparent, 6" paddles in 6 colors with 3 textures ..
Never Needs Batteries!Always ready for emergency use..
Grades 3-8. 23 × 35 Ã. A graphic illustration of s..
By touching 2 metal strips simultaneously, your body..
Grades 3—6. Students use mirrors, lenses, and prisms..
Shine white light through this 2", high-quality pris..