US$ 40.99
and color-mixing activities
this six-metal density cube set of brass
and a central control module
the numbered dicot leaf model on a base maps epidermal
Seven hand-painted removable parts expose atria
12-Slot Stroboscope Disc Manufacturer_hBARSCI and color-mixing activitiesRotating disc cut with twelve 0. 19 inch clear slots, producing the stroboscopic effect that visually freezes vibrating or rotating objects when the disc speed matches their frequency.