Teach your children basic financial planning.
Create a simplified table for your kids to use, where the labels used for the different fields are from their own world in their “language.”
Make the visit to an exhibition more fun for the kids (and their parents.)
Write secret facts and stories specifically for kids for specific exhibits. These are only visible to kids if they wear special glasses, or flash a special light around the exhibit and find these secret writings.
Are video games good for your kids? Which ones?
A website that reviews video and other games and tries to find out what are the benefits for the kids playing those games (what skills they are developing, both physical and mental), and what are the potential detriments.
Help you protect your kids from drowning.
A swimming cap with sensors and communication unit. When the cap is underwater for a longer period (more than a few seconds), you get an alert on your device (smartphone, special receiver, etc.), so you can check on your child to make sure all is ok.
You are on a trip with your kids. Teo problems you have: 1. The kids are constantly on their smartphone. 2. They are not all that interested in where you are and the interesting things to see there (monuments, museums, etc.)
Create games for specific cities and points of interest that use the kids’ smartphone to play, while walking through the city. Use the phone’s location and camera to add activities to the games, like finding and discovering things, solve puzzles, collect stuff, etc. At the same time, they’ll learn a lot about the place while having fun.