If you can’t get to the exhibition but still would like to see it (and another income stream for the museum.)
A virtual guided tour of the museum, where you progress from room to room, zoom in on the exhibited pieces and get an audio presentation if you want one.
For the museum, it’s a way to sell more books by having different price levels. The visitor gets a chance to personalize their book and get one at the price level they want to spend (not necessarily cheaper.)
Every time the visitor sees an exhibit they would like in their book, they select it (using an app, a special device they get when they enter, etc.) When they finish with the exhibition, they choose the type of book they want (how many pages, size, the amount of text, level of production quality, etc.) and after a short time they can pick it up at the museum shop printed especially for them just the way they wanted.
Why wait until the end, let the visitors pick up an item when they are most inspired to.
Place merchandise inside the exhibition right next to the exhibits themselves – the right items beside the right exhibits. This way the visitors can take a look, pick it up, and pay on their way out.
Make the visit to an exhibition more fun for the kids (and their parents.)
Write secret facts and stories specifically for kids for specific exhibits. These are only visible to kids if they wear special glasses, or flash a special light around the exhibit and find these secret writings.