I admit to not being a museum head myself. Now that I'm a parent though, I've gone to them all, multiple times. Before that, I'd not gone to any of them unless they're world famous.

If it wasn't for kids, nobody would go to most museums (non-famous ones especially)

Kids are simply the demographic, because every parent is looking for activities to entertain the kids every day.

Interactive non-screen based exhibits that are designed for kids are the best, but if you can't have that for cost/know-how reasons interactive multi-media exhibits are a good second on the "it did a good job entertaining my kid" spectrum.

Actually learning anything is a secondary demand from the consumer when it comes to museums unfortunately. Entertaining the kids is number one, bonus points if it also managed to entertain the parents.