My dad used to go all the time and would get lots of junk and a few treasures. Our boys loved some of the junky mechanical toys their grandpa would find for them.

Our youngest son got a wind up chicken that waddled, cheeped and twirled and had real feathers. I looked mortified when he opened it but it was his favorite gift that day, lol.
At our wedding we got a used toaster oven from dad and DH was not impressed and peeved for a long time, lol.
He got used to my dad though and learned to love him for his good points like I did.
Have fun but don't go crazy!