Inverting Pop Tops

Inverting Pop Tops - Natural Wood (bag of 5)

$5.95
12 points (Points accrued: 0)
Item #: TOP-300

Inverting Pop Tops - Natural Wood (bag of 20)

$19.95
40 points (Points accrued: 0)
Item #: TOP-305

Inverting Pop Tops - Red (bag of 5)

$5.95
12 points (Points accrued: 0)
Item #: TOP-330

Inverting Pop Tops - Red (bag of 20)

$19.95
40 points (Points accrued: 0)
Item #: TOP-335
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When these small wooden tops are spun, they start precessing until the heavier hemispherical end is lifted, seemingly against gravity. The Nobel Museum in Stockholm reports that Neils Bohr was captivated by this top when first observed over 50 years ago. These newly designed tops, with a hollowed out sphere, are like the original and work extremely well! The natural wood ones can be decorated by students. 3.8 cm (1.5 in.) tall, 3.2 cm (1.25 in.) dia.