We all know how expensive kids can be, sometimes it seems like it’s never-ending! Not only do we have to feed and clothe them but entertain them as well?Luckily there are so many options for entertaining kids that won’t break the bank.Make sure you check out discount websites like Groupon! There are daily discounted coupons for everything including activities for kids.Why not treat them to a trip to Sea Life Sydney for $25 including a meal (worth $37.45) – adult entry with meal is $35 (worth $55.95).There is a host of underwater fun for the kids to enjoy. They could check out the Penguin Expedition; visit the Jurassic Seas and meet the Port Jackson sharks, lungfish and jellyfish or meet a shark up close at Shark Valley!There is a Great Barrier Reef oceanarium, that’s just like the real thing and one of the largest in the world! You can sit back, relax in the Reef Theatre and take in the huge floor-to-ceiling view of the reef with teams of fish, sawfish and sharks swimming right in front of you.A perfect family day out that every kid would enjoy.You can also claim a bonus 5.00% cashback with cashrewards.com.au.Is your little one fascinated by the universe? Then a trip to the Sydney Observatory is just the ticket!Why not take them on an adventure to explore the historic site at Miller’s Point. Peek through Australia’s oldest working telescope and discover all about the planets, the galaxy, and beyond.There are family friendly tours for only $65 which includes a trip to the iconic Planetarium, telescope viewing and rocket launching. Experience some good old fashioned family fun whilst seeing some amazing planetary wonders. The Little Plaster Shop is Sydney’s newest place for creative entertainment. It features a large studio with a vast range of plaster painting pieces and craft activities.There is no need to book, you can pop in anytime for relaxing, artistic fun. Simply choose the piece that you would like to paint and you get to take home the end result.My son opted for a Lego Man and a money box skull, he was so proud of the end results!Prices start at $10 for a plaster piece.The best place to take your kids on the weekend! This is my all time favourite park. It literally has everything and it’s free! It features a bicycle track (including working traffic lights) for kids. This will keep them entertained for hours.Plus, if you have a little one learning how to ride a bike, Sydney Park’s cycling centre has a terrific course for kids aged 3-8. Kids can learn basic traffic and pedestrian rules on two wheels and join free. My son learnt to ride here in less than an hour!Sydney Park also has a picturesque lake and wetlands , a fabulous outdoor cafe and a great adventure playground with sandpits and some very big slides! Why not pack a picnic and the dog and make a day of it? Sydney Park is dog-friendly so you can even bring the family pooch, it’s my Duke’s favourite hang!Look this isn’t my idea of a fun time but the kids love it! Canterbury Olympic Park is one of Sydney’s best kept secrets. I didn’t even know it existed until recently when a friend told me about it.My son tried ice skating in London recently and I was keen to find somewhere in Sydney. I can’t believe this rink has been right on my doorstep the whole time.It has great ice and a successful Skate School with fantastic coaches. You can take advantage of the group lessons that run all year round. The best thing is you can join at anytime! It’s only $18 for a casual lesson which includes a 30min group lesson and 60mins of practice time and free skate rental. How’s that for value for money?So what are you waiting for? Get your skates on!There are always some great family deals on Living Social with discounts of up 70%!I found some fabulous bargains for Featherdale Wildlife Park. You can grab an annual pass from $55 and it includes lots of amazing deals including 20% off at the cafe, Souvenir Centre and Animal Encounters.Featherdale Wildlife Park is located in Doonside and is open every day from 9am – 5pm. Your little ones can feed the kangaroos and wallabies or meet a koala in the Koala Sanctuary.There are over 1,700 Australian native animals at the park so the options are endless.You can also claim a bonus 4.90% cashback with cashrewards.com.au.What kid wouldn’t love to climb through trees? At the Treetop Adventure Park you can do just that! You get to experience the Australian bush up close with amazing views of native Australian wildlife.Red Balloon is offering a great deal – for $28 you get a two hour climbing session.There are four different obstacle courses with tunnels, zip lines, wobbly bridges, cargo nets, rope ladders and a flying fox ride to get you back to the ground. That will keep them entertained for a few hours!You can claim 3.50% cashback with cashrewards.com.au.An art gallery is always a good idea because entry is free. Most exhibitions are free for children under five and you can always get a family discounts to the major exhibitions.There are also family programs that are designed for families to experience art together. It is a wonderful opportunity to get inspired and get those creative family juices flowing!If you have a budding artist in the family as I do there are free drop-in workshops on the first and third Sunday of every month and in school holidays.I’m also keen to try out their Tours for Tots program for my daughter. It’s aimed at children aged 3-5 years and each month there is a different theme. She would love it!One of the cheapest options and always a winner with the kids is simply jumping on a ferry! Take a cruise to some iconic destinations including Manly, Watsons Bay, Taronga Zoo or Darling Harbour.The trip is all about the journey not just the destination. It doesn’t even matter where you’re going. A trip on a ferry is is an absolute must-do Sydney experience. Plus it’s so Instagram worthy! Grab a seat on the top deck to take a photo with the kids and Sydney Harbour Bridge or the Opera House as a backdrop! It doesn’t get much better than that. The Teddy Bear Bee and the Blue Banded Bee are just two of 350 types of native bees that live in the Sydney area.Most Australian bees don’t live in hives – they live in dirt or in hollow stems or holes in trees.In this workshop put together by The Royal Botanical Gardens kids will find out about our native bees and make a bee hotel to take home.The workshop takes place at The Calyx, The Royal Botanic Garden Mrs Macquaries Road, Sydney.The price is $20 per child and each ticket includes your bee hotel kit which your little one will make in the workshop and take home.