Suggestions for Bukkit plugins??

So I recently learned Java, and have made 5 plugins in a matter of 12ish hours and I was wondering if anyone had any suggestions/requests/challanges for simple plugins for me to code (I'm bored right now, got nothing to do).
NOTE: All my plugins are on my BukkitDev waiting for approval

Uh....all I know how to do(right now) is add crafting recipes and set the join message ill try though...

Nvm, I'm scared to try...

Try to get more familiar with more of the API, so if all you know how to do is add a crafting recipe and a join message, how about make a plugin that runs off of a command next?

Ahh, great challange, I have already started!

a plugin that doesn't allow someone to break a item frame?

This works for me

Code (java):

          @EventHandler
          public void frame(HangingBreakByEntityEvent e) {
              if(e.getEntity() instanceof ItemFrame) {
                  e.setCancelled(true);
              }
          }

A hat-plugin that they a item in the inventory and choose a hat