That should work for a while but, the real problem with plastic bags is that the softer plastics tend to be more finicky because they absorb more such as unpleasant odors, molds, dyes, and chemicals in the plastics themselves. This can cause obvious problems. I stored all of my legos in plastic bags too but, when I found out about this I began investing into nice plastic storage containers. I would have used wood or cardboard but I than found out that over time cardboard and any wood or paper related product releases acids which are not good for your legos either. Hope these editional tips help you as well.