Seeing in color
Before your kid learns how to tell the time, you’ll be way past sick of answering questions about how long it is until snack time, or whether it’s time to go to the park yet. “15 more minutes” will just be met with a repeated question 5 minutes later, while you go and bang your head against the kitchen table.
This might help solve your problems. Color-code the different things that happen every day in your house, like homework, tea, bedtime, etc. And color-code the clock too! That way, even before they can tell the time, your child will know where they are in their schedule, and you can get some of your precious sanity back.