He's using both of mine. He swaps from one to the other when he runs out of bobbin on one of them. I piece mine by hand so I only use the machine for putting on borders and binding. I don't mind him using them but he won't learn to do the bobbins. I have tried filling them ahead of time, so all he had to do is pop one in, but he is scared he'll mess something up I guess. He's really doing well matching seams and all. I mean, these things have about 2500 blocks in each one. Maybe more. I'll post a picture soon. Just haven't had time to take one.