Thames & Kosmos Spy Labs Inc: Motion Detector Alarm
by Thames & Kosmos | Safeguard Valuables with Compact Alarm System | Essential Tools and Tricks of the Trade…
Price as of 2026-07-09. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$4–$13
- Mid-range:$13–$29← You are here
- Premium:$29+
Is This Right For You?
- •Thames & Kosmos loyalists — the brand spans 40 products in our database
- •You prefer well-established products — only 50 reviews, so the rating may still shift
- •Rating sits in the bottom 14% of spy gadgets — higher-rated options exist
- •BONNYCO Invisible Ink Pen and Notebook Pack 16 offers a better rating (4.6/5) at a similar or lower price ($15)
- •MALEDEN Invisible Ink Pen Stocking Stuffers: MALEDEN 6 Pcs — 56% cheaper at $8 (Score A+)
- •GIFTINBOX Invisible Ink Pens — higher rated at 4.8/5 ($20)
📊 Based on data analysis of 123 products in this category.
Mubboo Score: C
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other spy gadgets
Computed from live Amazon rating, review count, and price across 123 spy gadgets available to US consumers · last refreshed 2026-07-09.
How It Compares
This Product Thames & Kosmos Spy Labs Inc: Motion Detector Alarm | Most Popular BONNYCO Invisible Ink Pen and Notebook Pack 16 | Best Rated GIFTINBOX Invisible Ink Pens | Best Value MALEDEN Invisible Ink Pen Stocking Stuffers: MALEDEN 6 Pcs | |
|---|---|---|---|---|
| Price | $17.99 | $14.99 | $19.99 | $7.97 |
| Rating | 3.9/5 | 4.6/5 | 4.8/5 | 4.6/5 |
| Reviews | 50 | 11,718 | 565 | 8,510 |
| Mubboo Score | C | A | B | A+ |
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Check the batteries upon arrival as some pens may have defective or corroded batteries; sellers often provide good customer service for replacements. These spy gadgets are a hit for parties and creative play.
- Fun and engaging for kids
- Ideal as party favors or gifts
- Good value for money
- Invisible ink and UV light work effectively
- Defective units or battery issues
- Dim or weak UV light
- Ink visibility varies by surface
Related Video Reviews
- 📹 30 Hidden Spy Gadgets You Can Actually Buy on Amazon 2026 — Online Product Reviews
About Thames & Kosmos
- 40 products in our database
- Average rating: 4.1/5 across all products
- Price range: $7.47 – $77.35
- Categories: Board Games, detective-and-spy, game-collections, magic-kits-and-accessories, marble-runs, optics
If not the Spy Labs Inc: Motion Detector Alarm, consider these
Bottom Line
Thames & Kosmos Spy Labs Inc: Motion Detector Alarm earns Mubboo Score C. Priced at $18 — a mid-range option, below the category average of $25. Rated 3.9/5 from 50+ reviews. Strong buy if: thames & kosmos loyalists. Skip if: you prefer well-established products — BONNYCO Invisible Ink Pen and Notebook Pack 16 (Score A, $15) may fit better.
Frequently Asked Questions
Is the Thames & Kosmos Spy Labs Inc: Motion Detector Alarm worth buying in 2026?
It earns a Mubboo Score of C, with a 3.9/5 rating from 50 reviews — better than 14% of spy gadgets we track.
How much does the Thames & Kosmos Spy Labs Inc: Motion Detector Alarm cost?
It is currently $17.99 — mid-tier pricing for spy gadgets.
How does the Spy Labs Inc: Motion Detector Alarm compare to other spy gadgets?
The category's most-reviewed alternative is the BONNYCO Invisible Ink Pen and Notebook Pack 16 (4.6/5, 11,718 reviews, $14.99). The Spy Labs Inc: Motion Detector Alarm carries a Mubboo Score of C vs A.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-07-09) and may change.