As you work to figure out what a dream is trying to tell you, one thing to look for is conflict.
The Dream: I send my daughters red net fabric so they can make themselves costumes. I'm not sure they will be able to. I think I will also make myself a costume from this fabric, and I become excited about the prospect. A playful occasion is coming, some event that calls for these outfits. One part of me resists the idea of the work involved.
Interpretation: The conflict here is between work and play, and perhaps there is some confusion about the two. I am giving my (inner) children the means to be creative in a playful way, and I'm enthusiastic about joining in the fun. Then I realize that work is involved, and I am not quite so eager. This is one of the dichotomies of a life devoted to the arts. On the one hand, it's fun. On the other—it really is a lot of work. My unconscious is telling me not to get bogged down.