Described herein is a low power squelch circuit which comprises a clock generation unit to generate first and second phases of a clock signal; a sampling unit to sample a differential input signal according to the first and second phases of the clock signal, the sampler to generate a sampled differential signal; and a differential amplifier to amplify the sampled differential signal. The signal distribution inductor includes a base, a separated iron-core, and a plurality of induction coils. The speakers can be in the form of fictional or non-fictional characters and may have their output limited to minimise risk to an infant’s hearing. Upholstery material, such as carpeting, is attached to the surface of the heated fibrous layer.