KiwiCo Motion-Sensing Spider

Name: KiwiCo Motion-Sensing Spider
Brand: KiwiCo, Inc.
SKU: 257166
Price: 29.23 USD
Availability: InStock
Rating: 5.0 (3 reviews)

KiwiCo Motion-Sensing Spider - Main image

$29.23 ~~$42.99~~ In stock

Category: Science & Activity

Engineer a spooky spider prank that's so fun, it's scary!

Customize an eerie eight-legged pal, then engineer a retracting mechanism using springs and gears. Hook up the electronics to help your creepy, crawly friend sense motion and drop down when someone walks by. Hide your spider out of sight and let the pranks begin! Get ready for Halloween fun.

Eerie electronics
Build a device that detects when someone walks by.

Trick or treat
Set up your spider to prank friends and family.

Spider senses
Learn all about spiders in the Spider Insider Guide.

Check your selection

Confirm your chosen option and quantity before paying.

Delivery timing

Check the estimate before ordering for a particular date.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy

Refund enquiries

Contact the store with the order number and item you are asking about.

Please contact us for the refund processing timeframe before returning an item.

View policy

Shipping charges

Review the charge for your selected delivery service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy

Planning a return

Contact the store before returning an item; the policy below applies.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (5.0 / 5 · 3 reviews)

Michael ★★★★★ Oct 26, 2026

I’m really impressed with how the motion sensor works—it triggers the spider just as someone walks by, which gave my brother a genuine jump! The retracting mechanism with the springs and gears was surprisingly satisfying to assemble, and it moves exactly as expected. A fun build that leads to a grea

Hannah A. ★★★★★ Oct 25, 2026

The gears and springs click together so satisfyingly, and my son loved figuring out how the motion sensor triggers the spider to retract. It took us about an hour to assemble, and the creepy-crawly reaction when you walk by is genuinely hilarious. A perfect blend of building and pranking.

Kevin ★★★★★ Oct 24, 2026

My kid had an absolute blast building the retracting mechanism with the springs and gears, and the electronics hookup was easier than I expected. It’s genuinely creepy when it moves, but the pride on their face after engineering it themselves made it totally worth it.