I'm not sure if you are asking just about a slide show playable on the KN-7000, or other options? If you were going to "hand it down", yuo might want to consider DVD as a way to do it.

Although I do video production for a living using some fairly expensive equipment etc., at home I use an inexpensive iMac with the free software that comes with it, and I can fairly easily create slide shows and videos for family. I add music that I create on my KN keyboard. I give them as Christmas gifts each year to my siblings and their families.

An "eMac" for about $1300 is the lowest priced Mac system that can do this - and it can create DVDs. . .

There's alot more details to it - but this might be a place to start looking/researching ...

Jim