If you are bored now in your school half-term and you don't know with what you can waste your spare time, it's time to visit the english site Find Me A Hobby (press here to visit the site).
In this site, you can find a lot of ideas of what to do in your free time. It has a bunch of categories with kind of hobbies arts and crafts, bizarre hobbies, for instace.
Something that made me very excited in the beggining was that it has got monthly hobbies. However, I thing that they are for people who live in other countries... Don't mind! I'm sure you'll find a lot of other interesting things there!
Here's a photo of the starting page in this website: