In this world 36 million kids have taken part in Hour of code activities, by helping them to develop their skill in technology use and that might help to get a job one day.
Most of your kids wont be interesting in coding but these games can improve problem-solving and thinking skills which is important to kids
Most of these apps are available in multiple platforms like iOS, Mac, Android, PC, few games are free and few cost. It depends which one you gonna choose.
Web Browser: codecombat.com
Web Browser: machineers.com
Pricing: Free demo
iOS : Bee-Bot
Pricing : Free
Web Browser: thinkfun.com/robotturtles/