Weehoo bicycle trailers have been on the market for three years. The three Wehoo models feature a patented self-aligning design that attaches to the rear of any two-wheeled bicycle. The trailers bridge the gap between passive buggy-style trailers and active tag-along style trailers. The i-GO trailers use a three-point harness to secure children in their seats. The child has the option of pedaling or resting. A fully enclosed all-weather canopy accessory is also available.