Cool Maker2-in-1 KumiKreator, Necklace and Friendship Bracelet Maker Activity Kit, for Ages 8 and Up

Are the spools refillable with embroidery floss?

What is the difference between the optimize and the standard?

Does this require batteries?

I understand you can change the colors around but Does it make more than one design or is is the same design on all the ones you make?