Kids nowdays just have to many other things to do. It isn't like back in the 50's an 60's when we were youngsters. Kids nowdays also seem so have a short span of interest in things also.
Kids sure do have a lot more selections that's for sure. But certainly can't blame their short span of attention on them, kids have also gotten smarter at the same time. However it usually starts with the parents and the direction they give their children. The remedy is simple, introduce them to the hobby with a hands on experience. They'll go back to their parents and demand involvement ... parents flip the bill for the kids. Some will stay ... some will leave. But I can assure you, some will go away with a lifetime experience.
But I am surprised you invested in a commercial operation for children's hobbies, sounds all to familiar for me.