My TI-99/4A lasted me from the second grade until my Junior year at High School. I still remember getting it for Christmas. I really really wanted an Atari so I could play games. I was very miffed when I got that TI, but soon I learned that not only could the TI play games, but it would let me write my own also!
TI Basic was my very first programming language, self-taught from a book. Probably the best thing that ever happened to me, as it shaped what would eventually become my career.
I never did play hunt the wumpus, but I spent hours playing Munchman, Car Wars, TI-Invaders, and Alpiner. Later, I got the tape player attachment and started playing games like Treasure Island, and the Temple of DOOM. I never did solve those, though.
I still have that TI.. I should really think of something creative to do with it.