As part of the World Hijab Day, this colouring sheet is my contribution. You can download the high quality version below.
Encourage your daughters to wear the hijab when they're still little. This will get them used to wearing it. You can't expect your daughters to love the hijab if they seldom, or never, put it on. And you can't expect them to wear it immediately upon reaching puberty when they haven't done so before.
Start them early. This doesn't mean that you force them to wear it. Make it fun. Buy some pretty ones. Or get matching ones to yours. Read some story books with hijab as the topic. Get creative and make something crafty.