I just got an InStep child bike trailer last night, and am returning it today. The thing says it is made for two kids but it was literally MAYBE big enough for a small dog or perhaps one small child. The fine print in the box says 50 pounds max weight for one child (the outside of the box said 100 pound weight limit - very misleading) but my 40 pound kid was really stressing this thing. The biggest limitation other than there not being any framework on the bottom (the bottom dipped and looked like a bag on wheels) was the stupid afterthough sling-style seat which was in the middle of the trailer and not adjustable - as if the designers didn't consider a child may have legs attached to his/her torso - which was doubly odd as behind the seat was a quite massive "storage" area. Are there any inexpensive trailers out there that are big enough for a five year old? My kid has maybe six months or a year before she is good enough to actually ride her own bike along with me so I don't want to drop lots of cash for something that I will be selling in a year...