Objective To study the effects of toys for laboratory animals on reproductive performance and growing development of experimental mice. Methods ICR mice were fed with toys, the informations of reproductive performance and growing development were recorded. Results All the data of reproductive performance of the test group were higher than the control group except the number of newborn mice, and showed significant difference (P< 0.05). The data of growing development of the test group were higher than the control group too, but showed no significant difference (P> 0.05). Conclusion Toys for laboratory animals have good effects on reproductive performance and growing development of mice, and suggested to be used into the process of experimental mice raising.