Baby blocks are a part of every baby’s life and are the quintessential icon for expectant parents. Cut rectangular cake layers into squares and stack with icing in between each layer. Then frost the outside of the each cake block with buttercream icing or fondant. Decorate the cake with letters, numbers, and other baby themed items such as animals, vehicles, and baby toys. Another wonderful thing about a baby block cakes is that they can easily be customized in color if the gender of the baby is known and theme if there is something particularly special to the parents-to-be.