A perfect gift for a co-worker or boss! Red and blue holographic disks on either side of the mobile use diffraction gratings to create special motion effects. Start with just the push of the pendulum - mobile will run for weeks on single 9-volt battery (not included). Sturdy plastic base and sides support free-moving mobile.

$12.95

Click here for information on this item at Edmund Scientifics

TEACHING SERIES FOR BIOLOGY BASIC SET

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