The Samsung model has a setting that makes the touchscreen more responsive. It helps when the screen does not react well to a gloved finger or through a screen protector.
How to turn on touch sensitivity
From the watch face, swipe up to open the Apps screen.
Tap ⚙️ Settings, then tap Display.
Tap Touch sensitivity to turn it on.
Alternatively, press the top button and then enable Touch Sensitivity.
If the screen still does not respond well
Make sure the screen and your child's hands are clean and dry. Water or damp skin can affect touch.
Very thick gloves may still not work, even with this setting on.
If the screen is scratched or cracked, touch may not work correctly.