GORGEOUS! When my kids were born in '82 & '83, my MIL made them each a quilt with those blocks. Each block was a different colorway. When they were toddlers, I would put the quilts out on the floor and say "Jump on the Blue....jump on the Red.",etc etc. It's how I taught them colors, and people were amazed they knew their colors at such a young age. (Sorry for going on about it, but I was flooded with memories when I saw your pix)