Watch children as they play, eat, and relate to each other and to you. You will be surprised at how many problems children work on each day. Allow children to work on their problems themselves so that they gain the satisfaction that comes from conquering an obstacle. Do not always rescue them. Help children to be successful.
Experienced providers can tell each child's frustration threshold.
Step in right before a child is about to give up on a problem. Give a small hint or a bit of encouragement to help a child be successful. Allow failure sometimes. Failure can be good feedback. When the block falls, the child learns that he must balance it more carefully or select a smaller block.