In Nature Science and Life Technology at primary school, toys making are suitable for the model of inquiry teaching. The study aims to accomplish the manufacture of bouncing toys through the process of inquiry teaching. By way of making toys by themselves, cultivating the ability that students can find problems and create more ideal works. The subjects are the grade three students taught by the researcher. The main method is data descriptive-analytical method. The data are from researcher's observation, talk, one re-thinking record, learning feedback and description of inquiry process of Jump-Frogs; DVD live teaching and another views and suggestions of the other teachers. Researcher codes these data and does 'descriptive-analytical' and 'triangulation' to get findings and make conclusion. The findings give some ideas for primary teachers who teach nature science and life technology to carry out inquiry teaching.