I made some prayer helpers on a white background (no wasting ink here!), and although they can't read them, it helps them to have something to focus on to remind them what they should be saying to God. I cut mine out and laminated them, and each child has his own set.
After using them for a week or so, my children have grown leaps and bounds in their prayer life. I hope they will encourage your children as well!
Download a FREE copy of the Prayer Helpers.