I'm currently knitting a farmyard playmat for child of good friend (different coloured squares etc for fields, like yellow cornfield, brown ploughed field, grass for grazing etc) then adding corduroy pig huts and a little felt sewn and stuffed barn. Would like to add poppies to the edge of cornfield and wonder how parents feel about red buttons sewn on with black thread? Would you consider it a safety hazard for the child pulling off and swallowing? (friend is happy with this by the way, but if I wanted to make more and sell at craft fairs it's a different matter). All opinions welcome!