Have you heard of the term being solution oriented? Now that your child has crossed the crucial mark of being a toddler, his sense of decision making has also developed. He is capable enough to find an alternative solution to a simple problem when he is unable to solve in first place.
What you need to know
In such a scenario, you need to help him understand the importance of having solution oriented approach and also assist him in improvising on the solution he has come up with. This will instill a sense of confidence and decision making in him, which can help him a go a long way in future.