[UltraSane]

Some parents take their shoe off and put it near the child seat and put it back on when you drop the child off. If you forget to drop the kid off you will realize it when you notice you are wearing only one shoe. There are also apps that you can use to log a drop off so your spouse can see and verify.

Putting a air tag or other tracker on the child with a time based geofence is also pretty effective. It should alarm if the child is not at day care when they should be and alarm if the child is near work since you normally don't bring children to work.

[bombcar]

AirTag works almost perfectly for that - you can give it area where it shouldn’t alarm when you’re not near it.

The problem is its accuracy- unless your house is sufficiently large or far away from parking it will likely not alarm at being left in the car.