You guys should realize that the only reason most kids bicycles have no suspension is kids are standing on the pedals 98% of the time . ;)
If I thought it would do any good ... I wish I had an x-ray of my back to post so you could see exactly what no suspension can do to your spine .
I start my day by having to adjust my back , and , adjustments need to happen multiple times each day . It's pretty much a constant battle against debilitation and pain .