Question about educational documents and separate question about links

Hello, I am doing pdf accessibility work for a non-profit volunteer organization associated with WSU. We have until the end of February to make all of online forms PDF accessible. This is not my profession, but I ended up with the job because no one else volunteered and we have no budget for this. I am computer savvy and have most of it figured out, but we have some documents that I am stumped on.

The documents in question are documents that were made for presentations to children about nature. These documents are also printed out and handed out to children/families. The guidelines we have been given for links is that they need to be meaningful so instead of the weblink, I would have a link that says "read more about butterflies on x website", but that obviously would be useless in handouts. How would you suggest this be handled?