Logo's through time

I find it really interesting to see how logos have evolved over time. In the case of Shell, their logo has always been simply a shell but has got more and more stylized over time until the current logo which is very clean and simple. The name and the brand colours werent added until 1948 for some reason. Perhaps the colours weren't added until then because colour couldn't easily be reproduced until that time.

  

I came across these logos for Lego that feature in a new Lego book. The logo has changed a lot more than the Shell logo. It started as a 3d looking logo with the letters almost like building blocks. 

Next came this logo which looks somewhat like a car brand logo and doesn't look very fun. 

Then came this one which is more childish and fun looking and isn't far off the modern logo. I think it's the one i remember from my childhood too.

The most recent and best is this one in bright red and yellow, black and white. It's much more fun and jumps out at you. It's interesting that the letters are rounded but still suit lego really well despite it being famously square.