My mom dropped off this little gem from my childhood during her last visit. I believe this is technically the first portable gaming system I ever owned. (I may have had a Popeye Game and Watch before this, I just can't remember.)

The Little Professor, for the uninitiated, was a calculator made by Texas Instruments in the 70s that also tested your math skills. There were four levels you could select. Basically the thing just displayed math problems in tiny red numbers and you had to input the answer. After going through a set it would give you your score. The whole thing was sound free as well.

Now that's old school educational gaming.

What was your first portable?