You can give your dad a crystal display stand as a birthday gift. It is quite creative to customize your dad's photo into a crystal display stand. You are still in elementary school, and your dad knows that you don't have money to buy gifts, so no matter what you give your dad, he will be happy. For example, the painting and singing you have learned can be given to your dad as gifts. Sing a song for your dad, and your dad will be very satisfied. Give your dad a small gift you made by yourself to express your blessings to your dad.
There are many relatively cheap small gifts. Sometimes money can't buy sincerity. On the contrary, sincerity sometimes doesn't need to spend money. For example, you can wash your dad's feet once, which expresses your blessings and makes your dad happy that you have this filial piety. Giving a sunshine jar is also a good small gift for your dad. You can choose some cheaper gifts for your dad. You can also discuss with your mother and let you participate in a small part of the gifts she gives to your dad. No matter how much or how expensive the gifts you give are, he will be very happy.