Build your own Birdhouse Kit, Teachers, this is a great and affordable way to get your kids Design, Building while creating something practical and at the same time beneficial for the environment, Perfect size for a chickadee or finch, Comes unpainted, Assembly required
Streak platets are ideally sized for filed or lab testing. to test, rub across the specimen to determine streak color; use black for light minerals. size: 2inchx2inch. package of 10
Equilateral Prisms 3pc set, 1in, 2in, and 4in lengths, Material: Acrylic, Each prism is individually wrapped to protect it Will create a rainbow with any standard light source (phone will work) -- use a dark piece of paper with a 1-2mm slit, Size: 25mm face size
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