Remind yourself that God will not be offended by your youngster's act of noncompliance during prayers. Sooner or later, your little clown will actually take the initiative to pray. It is always good practice to praise your child in whatever endeavor he or she is taking toward worship. Children thrive with positive reinforcement. Another aspect of praise is in the form of music.
Children love to sing songs of praise.
Don't forget that praise is also an important form of worship. Remember to make prayer, or any kind of worship, as pleasant as possible for your children. Prayer need not be a chore or a bore. During our nightly prayers, we make it a privilege for everyone to gather in prayer. Often, a dose of creativity helps tremendously.