The key is to dump some of your bubbles on the sidewalk (as soon as the bubble touches dry concrete it will pop) and also to make sure that your straw has been dipped in bubbles otherwise it will pop the bubble as well. We did use paper straws so if you try this with a plastic one let me know if that works!
We had lots of fun making ladybugs and long caterpillars out of the bubbles too.these awesome bubbles a while ago. I have a large container holding the bubbles and I just refill up the little bubble containers with our own solution. I would highly recommend using the recipe I linked to above, the bubbles are so much stronger and they don't seem to pop as quickly as store bought bubbles.
This activity was just a fun twist to normal bubble play. My husband and I were even entertained by it for quite a while. We will definitely be doing this super easy activity again in our house!