for bunnings the pay is different to what to person said before. at 15 you wont get $10 depending on if your casual or part time. the reason i say that is im 17 and i only get 10, but before you tell me thats crap, i also get sick leave and annual leave, with pay, which you wont get in many other jobs if your 15. if you casual you'll get more money, i dont know how much im not casual, but in saying that you almost dont get shifts, only really in the busy times of the year other than that you might get one, maybe two every 2-4 weeks probs. if your permant part time, you'll get a set amount of hours each week.
so go online and apply.
(ps) for things to do. at 15 not heaps, like service desk, checkout, trollies, nursry maybe all that. buut, once you hit like 18 you have sooo much opportunity to do stuff. you can be trained in almost an department. so its pretty good. and the training is good to, boring but good, looks good on a resume.