This paper introduces a "stimulus-response dynamic demonstrator" made by ourselves, which aims to solve the difficulties encountered by primary school students in learning the nervous system such as abstract and lack of intuitive experience. The demonstrator adopted ukit edu Kit's Zeuzuki building blocks as the main material of simulated nerve. With the help of simulated stimulus signals of small steel balls and the prominence of simulated stimulus signals of light-emitting diodes and corresponding circuits, the teaching AIDS are more visible and dynamic. Two steering engines, infrared ranging sensors, analog receptors and effectors are controlled by a flat plate. Through programming technology to realize the integrated management of each component, improve the integrity of teaching AIDS. The application effect of the teaching AIDS is remarkable, which effectively improves students' learning interest and efficiency.