A pre-fabricated sensor assembly for an interactive object including an object substrate (402, 704), the pre-fabricated sensor (200, 270, 300, 350, 470, 702) assembly comprising: a capacitive touch sensor (102, 102-1, 102-2) comprising a plurality of flexible sensing elements; a first electronics module comprising sensing circuitry in electrical communication with the plurality of flexible sensing elements (108, 208-1..2018-12, 278-1..278-10, 308-1-..308-12, 358-1..358-12, 408-1..408-24); a communication interface (162, 220, 221) including a communication cable (220, 221), wherein the communication cable comprises a first end portion coupled to the first electronics module and comprises a second end portion; a receptacle coupled to the second end portion of the communication cable, the receptacle configured to removably connect a second electronics module to the pre-fabricated sensor assembly; characterized by one or more flexible retaining layers (210, 210-1..210-2) that define a housing for a first portion of the pre-fabricated sensor assembly, the first portion of the pre-fabricated sensor assembly including at least a portion of each of the plurality of flexible sensing elements; wherein the communication cable (220, 221) extends from within the housing of the one or more flexible retaining layers to outside of the one or more flexible retaining layers; wherein the receptacle coupled to the second end portion of the communication cable extends at least partially outside of the one or more flexible retaining layers to enable removable connection of the second electronics module; wherein each sensing line of the plurality of flexible sensing lines includes a first section that extends in a first direction at a first portion of the pre-fabricated sensor assembly and a second section that extends in a second direction at a second portion of the pre-fabricated sensor assembly; wherein the first direction and the second direction are substantially orthogonal; wherein a width of the first section of each flexible sensing line is less than a width of the second section of each flexible sensing line; and wherein the capacitive touch sensor comprises: an adhesive layer (216, 416) including a first surface coupled to the first section of each flexible sensing line and including a second surface; and a shield layer that is coupled to the second surface of the adhesive layer; wherein the shield layer extends over at least the first section of each flexible sensing line to provide a ground for electrical fields at the first section of each flexible sensing line. a capacitive touch sensor (102, 102-1, 102-2) comprising a plurality of flexible sensing elements; a first electronics module comprising sensing circuitry in electrical communication with the plurality of flexible sensing elements (108, 208-1..2018-12, 278-1..278-10, 308-1-..308-12, 358-1..358-12, 408-1..408-24); a communication interface (162, 220, 221) including a communication cable (220, 221), wherein the communication cable comprises a first end portion coupled to the first electronics module and comprises a second end portion; a receptacle coupled to the second end portion of the communication cable, the receptacle configured to removably connect a second electronics module to the pre-fabricated sensor assembly; characterized by one or more flexible retaining layers (210, 210-1..210-2) that define a housing for a first portion of the pre-fabricated sensor assembly, the first portion of the pre-fabricated sensor assembly including at least a portion of each of the plurality of flexible sensing elements; wherein the communication cable (220, 221) extends from within the housing of the one or more flexible retaining layers to outside of the one or more flexible retaining layers; wherein the receptacle coupled to the second end portion of the communication cable extends at least partially outside of the one or more flexible retaining layers to enable removable connection of the second electronics module; wherein each sensing line of the plurality of flexible sensing lines includes a first section that extends in a first direction at a first portion of the pre-fabricated sensor assembly and a second section that extends in a second direction at a second portion of the pre-fabricated sensor assembly; wherein the first direction and the second direction are substantially orthogonal; wherein a width of the first section of each flexible sensing line is less than a width of the second section of each flexible sensing line; and wherein the capacitive touch sensor comprises: an adhesive layer (216, 416) including a first surface coupled to the first section of each flexible sensing line and including a second surface; and a shield layer that is coupled to the second surface of the adhesive layer; wherein the shield layer extends over at least the first section of each flexible sensing line to provide a ground for electrical fields at the first section of each flexible sensing line.