@miata2u Thank you for your great comments and Fav Peggy, they are Oak Galls;)
Oak Galls are abnormal growths caused when a insets or mite lays their eggs on the tree, the eggs develop inside the galls, these cause no harm to the tree so are just left alone,
Oak Galls are abnormal growths caused when a insets or mite lays their eggs on the tree, the eggs develop inside the galls, these cause no harm to the tree so are just left alone,