1.) Create a simple script that allows you to modify the in-game Variables and Switches through a call-script. Add equations to it that are not available in the 'Control Variable' command.
2.) Do the same thing as above. But replace the in game variables and switches with local variables/instance variables that are accessible outside of your class.
3.) Draw a window on a map. Display the values you created in #2 on the Window
4.) Re-create the 'Show Choices' command using only scripts. (Hint: Command window)
5.) Create a simple custom menu system. Re-arrange/add/remove items from the default menu.
6.) Create a simple script which gives event local values, such as 'Event_HP' or 'Event_Defense'. Have your script print the values of the value. Hint: Game_Character and:
class Game_Event < Game_Character
7.) Try doing requests in the Script Request sections
Random things I pulled out of my ass.