Indoor air quality control has been strengthened within childcare facilities and welfare communities for the elderly and infirm. I have researched the indoor air quality of kids caf$acute{e}$s. The quality was determined by the measurement of $CO_2$ and HCHO, and the result was used in understanding of the current status of indoor air quality control. The higher level of $CO_2$ and HCHO were found in the playground area where children use compared to the area for guardians in kids caf$acute{e}$s. And the more people in the caf$acute{e}$s, the more $CO_2$ and HCHO were generated. It is judged that kids furniture produce harmful substances for children. Hence, the government regulations for kids caf$acute{e}$s should be improved by reinforcing the indoor air quality control, considering that the main customers are children not adults.