Greetings hobbitgrl,
Thanks for using Apple Support Communities.
I see that you and your husband just upgraded to iOS 10, and when you send a sticker in iMessage he doesn't get a message alert sound or banner when the phone is locked. I send stickers to my contacts as well, so I know it's important that the recipient is alerted. I'm happy to assist you with this.
In order to receive a notification, a sticker must be added alongside text in an iMessage. Stickers are used to decorate your messages. Please see the article Use iMessage apps on your iPhone, iPad, and iPod touch, specifically, this section:
To use an app with Messages:
- Open Messages, tap , and enter a contact or tap on an existing conversation.
- Tap , then tap .
- Tap in the lower-left corner to open the app drawer.
- Tap the app to open it.
- If you want to add stickers, drag the stickers to the message bubble. The stickers will automatically send once they're added to the message.
- If you want to use an app in your message, open it or tap the content you want to add to your message. Then tap to send.
Get a message with an iMessage app that you don't have? Just tap the blue name below the app to download it.
Have an amazing day!