For anyone else who has seen this image (or others like it) today, it's not a mummy-child. Ha ha. The tiny figure is symbolic of Our Lady's soul. She is depicted as wrapped in white - the symbol of purity and holiness. She is depicted child-like because of her child-like trust, faith and love. Finally, she is depicted in the arms of her Son, close to His Heart - no doubt exactly where she was upon leaving her body for Heaven before the Assumption.
So no worries in enjoying these icons! They're not blasphemous or scandalous in any way. They just depict the Blessed Mother twice. Once corporally as her mortal body reclines in "dormition" and once spiritually as the childlike and holy soul she was destined from all eternity to be.