Carrying color question

Hi all!

I’m working on a sweater for my dd, which has blocks of color. Each color requires its on little ball of yarn so that there are no carries in the back. This is easy enough to accomplish at home, but makes it difficult to take the project other places. Can anyone suggest an easier way to keep the balls of yarn better organized so that they don’t get too tangled, making for a more portable project?

As always, many thanks for your insight and ideas!

You can try putting them in a baggie with all the strands coming out one corner. At least they won’t drag all over the floor.