How to ride a bicycle

I have been trying to teach Parson and Josh to ride their bikes. I took their training wheels off and have been more or less holding them up as they try to figure it out. I try to be calm and positive to them. Most people see me as a patient person, but when I am doing this, I lose my patience! I don't know why I get so frustrated. Sooo... I know I don't have that many readers, but if there is anyone reading this that has any advice or ideas to help the boys or to help me in this situation, I would love to hear from them!