If you're interested in getting your child started on digital literacy, Google x Saturday Kids x 21C Girls is running a free full day coding camp at Google's offices this Saturday 27/8 (boys can join too!). https://www.eventbrite.sg/e/google-x-saturday-kids-x-21c-coding-camp-aug-27-2016-tickets-27256620285
You can try this app: https://www.gethopscotch.com/ It teaches the user how to create games. There are simple-to-follow tools and tutorial to help your child (or you) learn how to create a game. Have not tried it myself, but the reviews sounds promising. :)
Depending on how old your child is, LightBot and ScratchJr are probably good apps to get them started on. As Jacq mentioned, Hopscotch is very popular too, but prob better suited for older kids. https://www.scratchjr.org/ https://lightbot.com/