• is free to play
• runs on potato computers
• runs on potato phones
• easy to play with friends
• has new games experiences every day

I think the 2 last points are what really end up making it such a success with kids - low attrition to start and lots of different games in one place. It takes 2 clicks to go from a parkour race to a pet care sim.

When you’re targeting kids, your graphics should be easy to understand. Bright colors, simple shapes, it’s enough. If you think about it, those graphics wouldn’t be too different from what a kid can usually draw.