I hated this wagon, because even though it appeared cute, it is 100% plastic! I wanted a real METAL wagon, so I got a mini Radio Flyer instead. Works for me. I only ended up with the Little Red Wagon because I got a good deal at a thrift store. The handle was broken off, but the wheels were fine, and I can easily attach it to my Radio Flyer! Now my two babies can have a double wagon--double the fun, right?
Oh, and my Bitty can sit in the wagon unsupported--actually she fits just fine. I would say that might be because she has a lot of stuffing, but my ONB doesn't, and she fits wonderfully, too.