Beautiful produce. Now that's a bunch of onions.
I tried keeping onions a couple of years back, they did last till about January but then they started rotting. I let them dry, took a rope and tied them off individually to get air. One reason is I raise the Texas Sweets and they don't keep as well as the hard red or white onions but we love them.
That should be a wonderful experience for your grandson, I hope he will appreciate the experiences he is getting. When mom got old we wanted to trade our new house in town for her 30 acre farm to raise the kids on, but no way. I think she thought we were getting the better of the deal. Little did she know we were talking about tearing down the old house and building new, but it didn't work out. Our son would have been better off to have grown up in the country, he missed so much I think.