If your kids often ignore your texts, you might want to consider looking into this app...
From the ReplyASAP website:
Not certain if your messages are being heard and seen?
Be certain, send them an ASAP.
ReplyASAP allows you to send messages to people you've connected with via the App. The message will appear on their phone over what ever they are doing, and make a noise until they interact with it, even if the phone is on silent. You will then get notification that it has been read.