The G4G 2025 Fall Benefit Auction ends in less than a week.
It will run from October 11 – 18, 2025. Don’t miss out!
Now is the perfect time to get gifts for the holidays, birthdays, and other occasions! Unique items in the auction include International Puzzle Party (IPP) puzzles, notebooks, and books. Proceeds fund G4G16 scholarships, virtual Celebration of Mind talks, and other outreach initiatives.
Featured Auction Items – IPP Puzzles
Pig & Cow Disentanglement Puzzle
Double Take Checkerboard Puzzle
Penny Farthing III Disentanglement Puzzle
Cubes & Ladders Puzzle
Twelve Edges
Featured Auction Items – Vi Hart Notebooks
Now is your chance to win a notebook with the drawings featured in Vi Hart’s videos!
Doodling in Math Class: Sick Number
How to Snake
Sonnet on a Higgs-Like Particle
Featured Auction Items – Books
Inversions by Scott Kim
12 Tricks with a Borrowed Deck by Martin Gardner
Martin Gardner’s Impromptu
Online Auction Fundraiser
- When:
Sunday, October 11th through Sunday, October 18th, 2025 - Timing:
Auction items will open for bidding between 10am and 11am PT and each individual auction item will close at the same time one week later. Individual auction items’ opening/closing times will be intentionally staggered to allow participants to easily bid on multiple items. - Where: eBay for Charity (see details below).
- What:
A wide variety of items have been donated that we expect will spark the imaginations of the G4G community and like-minded friends. These items will be posted for auction via eBay for Charity where 100% of proceeds will go to support the G4G Foundation. - What kinds of items will be in this auction?
Puzzles, notebooks, books, and more!
FAQ
- Can I donate an item to be auctioned?
- Not for this auction. But let us know if you want to donate something for a future auction.
- How does shipping work?
- For many eBay auction items, winning bidders will be responsible for covering shipping costs, which will be paid as part of the eBay purchase. Winning bidders may also be invoiced separately via PayPal after the auction closes for additional shipping insurance coverage.
- Is my purchase tax deductible?
- If you donate an item to the G4G auction, usually the fair market value of your item(s) is tax deductible. We recommend you to consult a tax advisor.
- If you bid on an item on G4G’s eBay for Charity site, only the portion of the bid ABOVE the fair market value is tax deductible.
- Consult your tax advisor for your specific circumstances.
Who Can Participate
The Online Auction Fundraiser is open to everyone! G4G past attendees, potential future attendees, and the general public – all are welcome to join in the fun! Please share with your friends, family, coworkers, and neighbors. The more bids the better!
How to Participate
1. eBay for Charity
The G4G Auction is held on eBay for Charity where 100% of auction proceeds will be donated to the G4G Foundation. The eBay auction features a wide variety of physical items (games, puzzles, art, jewelry, books, and more!) Functioning in the same way as the original eBay marketplace, eBay for Charity allows us to efficiently sell a wide range of donated items through their platform.
PLEASE NOTE: G4G does not offer appraisal services; auction item values are estimates provided by the item donor. These values have not been independently verified by G4G.
2 Direct Donations
If you prefer to give a monetary donation directly to G4G, you can always do so on the donation page on our website.