Was not provided with that information recommend reaching out to manufacturer.
Yes, they should be easily removeable.
It's grey.
Unfortunately the manufacturer has not provided that information, even on their own site. We recommend contacting them directly, they should be able to answer that question for you. You can reach them here: https://www.woodstockint.com/contact
This weighs approximately 28lbs.
Yes, this should fit a baby.
Unfortunately the exact height of the base/rails is not available from the manufacturer. The wheels are 10" pneumatic wheels and judging by the images the wheels are a bit larger than the overall height of the actual base/rails. If I had to guess I would place the height right around 8-9", but the exact height is not available. You can always add higher railings as well as the wagon needs to be assembled and higher wood railings could be installed into the base.
We do not currently carry just the wooden sides.
This wagon has a 14" x 32" box.
This should be easy to assemble. You can find the parts list and manual here: https://d27ewrs9ow50op.cloudfront.net/manuals/d3244_m.pdf