A set of connectors for a science toy and a teaching aid for a suction tube, comprising: a drive handle, a connector, a positioning ring, and a cross-section bo The set of connectors of the present invention can increase the shaking angle and stability after combining with the suction tube, and the rectangular convex pillar of the connector supports the suction tube directly so that the suction tube is transformed from a circular tube to a rectangular tube structure, so that the suction tube has a relatively large load capacity Can still be maintained, and can be combined with a diverse set of functional connectors to create more styles of model designs.
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