The birthday gift for dad should be sincere and real, because we are all family, and there are not so many forms. So you can give your own DIY gifts or buy some gifts that dad can use on weekdays.
You give your dad a gift that he likes or can use. No matter what you give, your dad will be happy, because your dad knows that it is a birthday gift you specially chose for him. Dad will be very happy to know that you have that filial piety.
In fact, it is also okay to give your dad health equipment. Dad is almost 60 years old, and his health is definitely not as good as when he was young. Giving him a health equipment to let him exercise is good for his body.