"A mean 'Orange Blossom Special'?? Busking?? Loves to buy strings for his fiddle..."

It sounds like he's got plenty of enthusiasm!

It's not uncommon for kids to need some prodding to practice. And I do understand that you are paying money for these lessons and don't want to throw it away. He will get the most benefit from his lessons if he does practice regularly, but at the same time you don't want to push him too hard so that he will lose his joy for playing. Perhaps you ought to try letting the responsibility for practicing be his. In other words, if you both can agree on a set amount of time per day for practicing, (10, 15, 30 minutes a day?) then let him decide when that will be. ( Right after breakfast , right after school, right after dinner...etc.) If it was around the same time every day, it would be easier for him to assume the responsibility for it, allowing of course, for some exceptions when something special comes up.

Orange Blossom Special??? That's great!!!

Good luck! KT