Yep, I can imagine a 24mm would be fun to play around with! @dfrazer’s suggestion is a good one if you want to experiment with macro. Another option if you want to go “super macro”, is to try reversing the lens! 24mm is wide enough that it should give you some pretty decent close-ups reversed. You might even be able to reverse and use extension tubes for maximum effect if you still need more magnification. 🙂 You can get a cheap reversing ring for Canon at B&H for example. (Make sure you get one that fits the filter ring diameter of the lens: 52mm in this case).
Have fun!