Baby Expos
Bellies to Babies - This happens in the fall in Vancouver and was by far my favourite. It's very popular so plan to attend early if you're hoping for giveaways and expect a line up. When I attended, the first 100 got an extra gift, but everyone gets gift bags on the way in. Entry is by donation to a children's cause they support.
Baby and Family Fair - You can also check out the Vancouver Convention Center site for a more up to date schedule. There's an entry fee here, but closer to the date you should be able to find a two-4-one on a site like Groupon or Living Social. Only the first 100 here get gift bags, though when we went there was a stand promoting an online baby giveaway site and they had good sample bags available. Overall, not the best expo I've attended, but it's worth a look.
Mums, Tums, Babies and Toddlers Show - Based in Cloverdale/Surrey area of Vancouver, another expo to check out.
Birth Fair - Another expo in Cloverdale/Surrey to aid the BC Women's and Children's Hospital. Started in 2016, it's another place to explore pregnancy, babies early days and connect with service providers to get some of your questions answered.