Power requirements vary by model. Common battery types shown in listings include AA (examples list 3×AA), AAA (often 2–5×AAA), and LR44 button cells (1–2). Some listings simply specify "alkaline" cells. Always check the specific product listing for the exact battery type and count.
Most motion-activated spider decorations are intended for indoor use. Some are rated for sheltered or covered outdoor placement (e.g., under a porch) but are not meant for full exposure to weather. Verify the product description before outdoor use.
Sizes range widely: compact electronic figures can be only a few inches tall (for example about 4.65 inches), while large prank or decorative spiders may be roughly 15–16 inches across.
Typical effects include walking, jumping, or scuttling motions; LED or glowing eyes and other light-up effects; and accompanying sounds or music. Some models also have posable legs for display.
Many motion-activated spider toys are labeled for young children, commonly "3 years and up." Some listings specify ranges such as 3–10 years or note 6 years and up. Check the product packaging or listing for the exact recommended age.