You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A normally developing 10 months old child should be able to do all of the following except _________ and explain in detail?
the child is able to make tower of 2 blocks by 15 months and tower of 3 blocks by 18 months. Ref: OP GHAI - ESSENTIAL PEDIATRICS - 8 TH edition page no 50