Hire Bemular??
Bemular can actually be hired to write and record songs, educational or otherwise.
You might not know this, but the Bemular songs "Natural Resources," "The Oceans Song," and "Scientific Method" were all originally created for use by a group responsible for putting on educational seminars.
There is not a set fee for this, as it varies depending on what the topic is. If it's a good general topic that could also be used to make a Bemular YouTube video, the fee would be on the lower end of the range. If you wanted a personal song about your daughter called "Dear Sally," it would be significantly more expensive. In all cases, Bemular retains ownership of all creations unless discussed in advance.
If you have an idea or any questions about this, click on the "Contact" button above.