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and a bimetal switch
Premium Quality: Light Refraction & Reflection Experiment is made of high-grade construction all the way through
Ideal for middle and high school classrooms
Silk gains a positive electrical charge
the ball will not pass through the Ring
Set of 96 Teddy Bear Counters Assorted Sizes Comes in a Sturdy Plastic Box Troughs and a bimetal switchA set of 96colourful bears, each teddy bear displaying its mass on the belly. Supplied in a sturdy storage container. These adorable plastic weight related teddy bear counters come in red, yellow, blue and green and four different sizes. They come in four masses, weighing respectively 12, 9, 6 and 3 grams. Use these counters for a wide range of (mathematical) activities. Sort the teddy bears by shape as well as by size weight. Or create a pattern of
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