My 9.y.o. engages happily enough with all the home ed work we do - maths, English, etc - and has a curious mind. But when I'm busy with his brother, or working, he just flops around and can't keep himself busy. He doesn't really have much self-motivation. I'd love for him to find a proejct / activity that he can work on independently whenever there is some free time that needs filling, but no idea what. Any suggestions?