My Earliest Memory involves these blocks my sister and I used to play with. All I remember is building a really tall tower out of them and putting things like tree shaped pieces and zebra, giraffe, and polar bear shaped pieces on various corners of the tower. What I think stands out most was the fact that we somehow built the whole thing on wheels and then showing everyone at home at the time our great achievement. I just remember having a really fun time playing and building with my sister.
Although its not my EARLIEST memory, I have other memories of when I was very young of building tall towers with blocks. I find it really interesting that I had a similar feeling of accomplishment after building with blocks. I cant remember what they looked like but I remember the feeling when you stand back at look at your work.