1 A bookshop tour (by Rachel Cheng)
For bookworms, Page One has a wide variety of books, ranging from science fiction to biographies.
The new-arrival teen novel Passion, by Lauren Kate - about fallen angels - is already on the bookshelves. You can also have some cakes and a sip of cafe mocha at Page One cafe, as well.
Page One, Shop L/G, 1-30, Festival Walk, Kowloon Tong, Kowloon. Tel: 2778 2808
2 Have a picnic - indoors! (by Olivia Yu)
Who says that you cannot have a picnic when it's raining? A picnic out in the park is often hot, humid and sweaty - and the food can be spoiled by the heat.
However, you can stick to the comfort of the indoors while listening to the calming sound of the rain - and have a picnic. Simply invite your friends over and ask them to bring sandwiches, cupcakes, crisps, fruits and lemonade. Yummy!
3 Paintballing (by Olivia Yu and Cameron Tucker)
When it's rainy and grey outside, nothing is more fun and colourful than paintballing. Paintball is a strategic sport where players shoot their opponents with paintballs, which explode in colour.
Book a game with a team of friends. Participants must be at least eight years old and 1.30m tall.
Paintball Headquarters, Unit No2-3, G/F, Po Lung Centre, 11 Wang Chiu Road, Kowloon Bay, Kowloon. Tel: 3106 0220
4 Find a penfriend (by Kate Ng)
Rainy days are best for staying at home and surfing the internet. Go to penfriend websites to find someone willing to share details of his or her life with you. You can even share music or blogs.
There are many penfriend websites. For example, take a look at www.penfriend-club.com. It's free, quick and easy to find a penfriend that best suits you.
5 Go bowling (by Victoria Kwok and Samantha Cheng)
When it's raining, you can't stay dry and do outdoor sports. But if you're a sporty person and want to exercise your arms, why not go bowling?
The activity is a great way to pass the time; playing with friends or family members - chatting while you are bowling - is especially enjoyable. There are many bowling alleys to choose from across the city.
SCAA Bowling Centre, 88 Caroline Hill Road, Causeway Bay. Tel: 2890-8528; www.scaa.org.hk
Olympian City Super Fun Bowl, Shop 148, 1/F, Olympian City 2, 18 Hoi Ting Road West, Olympic, Kowloon. Tel: 2273 4773
6 Use the rain for creativity (by Fabienne Chui, Tracy Srivastava and Giselle Chan Cheuk-ying)
Take time out to look and listen to the rain as it hits your window. Use the melancholy mood to play some music, sing, paint or relax.
7 Let's go to a cafe (by Kaman Cheung)
Make good use of your time with your dearest friend or family on a rainy day! Surfing the net, via Wi-fi, playing board games with friends, singing karaoke and eating tasty snacks ... all these things can be done in a cafe. It is also a fabulous place in which to meet and chat to companions. So don't delay.
Station 3 Cafe, L6, Kelly Commercial Centre, 570-572 Nathan Road, Mong Kok. Tel: 9793 6299
8 Board games and comfort food (by Seung Jay Lee)
Here's what you need: hot milk, chocolate powder, a board game like Monopoly - and four people. First, add the chocolate powder to four cups of hot milk. Then play Monopoly, sitting in front of the window while sipping the drinks and enjoying the gentle rhythm of the rain on the glass.
9 Meander through museums (by Cameron Tucker)
Make a date to go back in time to see Asia's World City" in pre-historic days at Hong Kong Museum of History, or discover the inner workings of life at Hong Kong Science Museum.
Hong Kong Museum of History, 100 Chatham Road South, Tsim Sha Tsui. Tel: 2724 9042; http://hk.history.museum
Hong Kong Science Museum, 2 Science Museum Road, Tsim Sha Tsui East. Tel: 2732 3232; http://hk.science.museum
10 Get your sports fix (by Cameron Tucker and Samantha Cheng)
Don't let the rain stop you getting your regular adrenaline rush. If you are fit enough, head to the YMCA and try its indoor climbing wall for an ultimate cardio workout. Or play squash at one of the many government-run squash courts. That will leave you happy.
YMCA of Hong Kong, Salisbury Hotel, 41, Salisbury Road, Tsim Sha Tsui, Kowloon. Tel: 2268 7000; www.ymcahk.org.hk