Abstract: A teaching mat includes a plurality of parts which are connected with each other and disposed on floor. A first hole is defined through a center of each part and a sound generating member is received in the first hole. At least one second hole is defined in each part and located beside a designation member engaged with the part. A circuit board is received in the at least one second hole and electrically connected to the sound generating member. A conductive spring piece is located in the at least one second hole and a gap is defined between the circuit board and a main body of the conductive spring piece such that when pushing a button engaged with the at least one second hole, the conductive spring piece is lowered to touch the circuit board to generate a specific sound from the sound generating member.

Abstract: A method for forming a multi-layer ceramic electronic device includes the steps of (a) forming a circuit layer with a pattern of contacts on a ceramic substrate, (b) forming at least a dielectric blank sheet with a pattern of through-holes on a supporting film, (c) filling each of the through-holes in the dielectric blank sheet with a conductive paste, (d) drying the conductive paste in the through-holes, (e) overlaying the dielectric blank sheet on the circuit layer on the ceramic substrate in such a manner that the through-holes are registered respectively with the contacts, and (f) pressing and heating the ceramic substrate and the dielectric blank sheet.