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Sale Price $12.38.
Original Price $13.75 Comp. value
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Present Is A Relative Concept (Light Cone Physics) Keychain
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Style
Aluminum Circle
+$3.55
+$3.55
+$17.55
+$17.55
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Present Is A Relative Concept (Light Cone Physics) Keychain
Do you often wonder where you are on the time-space continuum? Wonder no further with any of these physics humor geek attitude gifts featuring exactly where an observer is in the present, between the future light cone and past light cone. Make others do a double-take with any of these educational, scientific truism saying gifts which notes that "Present Is A Relative Concept"!
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4.6 out of 5 stars rating5.4K Total Reviews
5,413 Reviews
Reviews for similar products
5 out of 5 stars rating
By Ali Y.February 4, 2026 • Verified Purchase
Aluminum Circle, 2"
Lovely & cute keychains i love them thank you sooo much ,they also reached to me soo fast 😍.
5 out of 5 stars rating
By linda f.June 18, 2025 • Verified Purchase
Premium Round, Small (1.44")
So cute and this is perfect!!!
5 out of 5 stars rating
By AnonymousSeptember 22, 2025 • Verified Purchase
Aluminum Circle, 2"
I went on vacation and family and friends want me to get them a key chain I was already returning home so I got it from zazzle there happy!!
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Product ID: 146301347310020903
Created on: 6/13/2010, 3:12 PM
Rating: G
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