Three-dimensional lightweight foam greeting cards are described herein having a foam body with a perimeter wall that extends between two spaced apart parallel pieces of planar sheet material such as heavy gauge paper, cardboard, or other such material. The greeting cards have a partially hollowed foam body or one or more cavities in the foam body concealed in the front and back by the planar sheet material which may be pre-cut in the shape of the foam body are decorated consistent with the design of the foam body. The cavities in the foam body may contain various electronic components that enable the greeting card to produce sound, record and playback a personalized message, trigger light activation, trigger the movement of moveable parts, display digital video, photographs or slideshows, or a combination thereof. The greeting cards may include various switch mechanisms that may be located and accessed through various locations on the foam greeting card body.