Laser Pointer Activities   Stock #: 652291 Price: $9.95 Quantity: Quantity in Basket: none BUY IN BULK! Quantity: 20-99999 Price Each: $8.95 SAVE MONEY! By Thomas Altman. 9 laser pointer activities: earthquake detector, music controlled laser patterns, crystal ball laser projector, diffraction and moving diffraction grating, representing a black hole, laser Lissajous patterns and twisting beams.

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