LED matrix is pretty good way of displaying information because you can do text and graphics in quit easy way. So this is a fun project that includes 24×6=144 LEDs that are controlled by scanning rows along with columns by using a simple 4017 decade counter chip.
Probably the hardest task is to solder them, especially on a prototyping board. Anyway when it’s done, you can connect to Arduino with only few wires and give it a try. To make symbol generation much easier there is an excel file so you can create your own symbols and characters.