Qeridoo Single seat bike trailers for infants, kids, and toddlers. Qeridoo Bicycle trailers will keep your little one safe and sound during outdoor fun. German-made, safety is #1 with Qeridoo. Countless test reports and awards recommend Qeridoo over any other brand. With over 15+ years in production and dozens of awards, it's no surprise that Qeridoo takes the prize.