Just think of the DIY potential that wind chimes have and you will see that it indeed has a lot of scope. In fact, depending on the wind strength at a particular time of the year, you can work on a project for a wind chime for different seasons and even different locations at your home and gardens. Once you are into it, you can have your kids researching the different vibrations and intonations that using different kinds of materials can cause and have them making wind chimes based on this.
The caution however, that you have to take with wind chimes is to ensure that bits hanging off the strings do not get cancelled but this will be a factor of the weight of the objects that you hang off them. We are sure that now that we have given you the idea, you must be eager to get started. Do let us know how your wind chimes turned out.