please do not hesitate to contact our customer support team. thank you for your interest in this question. it works across cultures and ages. they are the pieces that will attach to the different levels of your home. they keep going every so many months, they go and have another six weeks or something, to keep them up to date. i sat it out for a couple hours to which i started noticing some blood and lower back pain. this will create an organic learning culture in the organization. “of course,” i replied, just to be agreeable. this bike bridge is very much needed. 