I dont think kneeling, closing the eyes or holding the hands in form of prayer is bad. Its a way a person expresses himself to God as long as it is not a show off or for the benefit of pride or people to admire or piety him. Many times I close my eyes to avoid distraction. Like when I am in church I close my eyes to avoid distractions when people are moving. It helps me to concentrate. Kneeling is a form of humility, when you humble yourself before God. Jesus knelt before cruxification. The same with Daniel. Clapping of hands is not bad either but for me at times I consider it as a destruction.
Prayer is not always said loudly, at times you can whisper or pray in your heart for example when you witness an accident and people have died. You can tell God to comfort the loved ones of the people who died without uttering a word. God hears and knows whats in our hearts.