I know I'm a little behind the times in terms of posting these...

But I decided to focus on Transportation and then break it down by:

walking

-how long

-how often

-how/why was it fun

riding my bike

-how long

-how often

-how/why was it fun

airplane

-how long

-how often

-how/why was it fun

lightrail

-how long

-how often

-how/why was it fun

car

-how long

-how often

-how/why was it fun

For my pictograms, I wanted to focus mainly on energy and motion. I feel like orange arrows tie them all together highlighting the idea that transportation is about movement and direction.

As for the color, I'd ultimately want the orange to be super fluorescent like street signs might be.