If there is a charity or fundraiser you feel really passionate about, are you using your blog to share this with your readers? Many websites offer an "embed" option to share information from their site to yours. GoFundMe and Kickstarter include an Embed option to share their fundraisers to other places besides social media accounts.
NOTE: Because you are dealing with a third-party script, it is recommended that you complete your blog draft first and then proceed to insert your script last, just as you're ready to schedule or publish your post.
Locate the "Share" button on the GoFundMe or Kickstarter page and select "Embed", this will direct you to a pop-up window where you can customize the appearance of your makeshift fundraising widget.
The code is generated for you, all you need to do is copy and paste it into your blog post. It's very easy to embed HTML code into your post using the HTML editor tab on the Compose Page. In your draft, switch to the HTML tab.