As kids drive vehicles around Wild Planet’s Sonix City play sets, they trigger different noises and voices unique to the vehicle. The rescue set’s police car and fire truck activate squealing tires, sirens, alarms, and emergency calls. Sonix City’s 3-D interactive play sets include rescue, raceway, construction, and airport themes. Each play set comes with two vehicles, features more than 100 sound effects, and can combine with other Sonix City play sets to form one giant city.