Learn English – a “prize” for last place called

Reminisce means to talk, think, or write about enjoyable experiences in your past (Macmillan Dictionary) or to indulge in enjoyable recollection of past events (Merriam Webster).

Your example sentences could be reworded:

•Wayne reminisced about the days spent with the family. •She reminisced about last weekend.

Reminiscence would be the noun form. (I did find it interesting that most dictionaries define the verb reminisce as an enjoyable act, but the noun reminiscence was not necessarily defined as being pleasant or enjoyable.)

Junior is the third grade. Senior is the fourth grade.