One way to make a younger child excited about saying their verses is to have him/her say them to appreciative relatives (even when the relative lives far away.)

Of course, you can call and the child can say the verse over the phone - or you can put him on his own podcast.

Here's a brand-new Sparkie saying his very first Sparks verse for out-of-state relatives..

http://www.loudio.com/Podcasts/Society/Religion/Jacob-Saying-John-316.268139