A toothbrush comprising: a handle made of a first material and having a head and a base and an interior cavity, and a longitudinal axis extending between the head and the base; a plurality of bristles attached to the head; a light (60', 60'', 60''') positioned in the interior cavity; a power source (66', 66'', 66''') positioned in the interior cavity and configured to provide power to the light; a circuit positioned in the interior cavity and electrically connected to the light and the power source; a grip configured to be held by a user's hand, with at least a portion of the grip being made of a second material different from the first material, the second material being flexible, with the grip surrounding the longitudinal axis and surrounding at least a portion of the base of the handle; and a switch mechanism (100, 100'', 100''') including an elongate rod (112, 112'', 112''') that is separate from and unconnected to the grip and has a first end and a second end, with the first end of the elongate rod extending away from the second end of the elongate rod in a direction towards the second material of the grip such that the second material of the grip covers the elongate rod, the switch mechanism configured such that a force applied to the second material of the grip in a direction towards the first end of the elongate rod moves the elongate rod in a direction away from the second material of the grip to complete the circuit to initiate illumination of the light for a set period of time; characterised in that the power source is fixed in position in the interior cavity such that the power source does not move when the elongate rod is moved in the direction away from the second material of the grip to complete the circuit. a handle made of a first material and having a head and a base and an interior cavity, and a longitudinal axis extending between the head and the base; a plurality of bristles attached to the head; a light (60', 60'', 60''') positioned in the interior cavity; a power source (66', 66'', 66''') positioned in the interior cavity and configured to provide power to the light; a circuit positioned in the interior cavity and electrically connected to the light and the power source; a grip configured to be held by a user's hand, with at least a portion of the grip being made of a second material different from the first material, the second material being flexible, with the grip surrounding the longitudinal axis and surrounding at least a portion of the base of the handle; and a switch mechanism (100, 100'', 100''') including an elongate rod (112, 112'', 112''') that is separate from and unconnected to the grip and has a first end and a second end, with the first end of the elongate rod extending away from the second end of the elongate rod in a direction towards the second material of the grip such that the second material of the grip covers the elongate rod, the switch mechanism configured such that a force applied to the second material of the grip in a direction towards the first end of the elongate rod moves the elongate rod in a direction away from the second material of the grip to complete the circuit to initiate illumination of the light for a set period of time; characterised in that the power source is fixed in position in the interior cavity such that the power source does not move when the elongate rod is moved in the direction away from the second material of the grip to complete the circuit.