2-year-old child came to pediatrician because he has not started walking. His mother says that he can stand but cries to be picked up or sits down shortly.  His sister started walking around 14 months. He is talking well with short two to three word phrases. He is able to build a tower of six blocks. What is your management plan?

1. Advise mum to work harder at giving him independence and follow up in 4 months.

2. Request blood tests including a creatinine kinase

3. Refer for physiotherapy

4. Reassure and discharge as his development is normal