1. Prepare tools that need a sand hammer. The tools mainly include two yogurt bottles, three colors of colored paper (yellow, purple and green), one double-sided adhesive and one transparent adhesive, a pair of scissors and a spoon.

2. Step 1, measure the length and width of the three parts of the bottle. In addition, you need to prepare three-color paper and cut out three pieces of color paper according to the measured length and width.

3. Step 2: Stick double-sided tape on the back of the colored paper, cut the lower part of the double-sided tape into tassels with the prepared scissors, and finally stick it in the middle of the bottle to make the tassels turn outwards.

4. Purple colored paper is the same as the above steps, and green colored paper does not need to cut tassels. Everything else is the same, and then stick it on the yogurt bottle.

5. You need to prepare the sand in advance, and then put the sand into the yogurt bottle with a small spoon. You can add as much sand as you like. Personally, I think one third of the yogurt bottle is enough and the sound will be better.

6. After making the second yogurt bottle, put the second bottle without sand on the first bottle with sand, and the bottle mouths should be aligned. Then fix the two bottles with transparent glue prepared in advance. When the sand hammer is finished, you can play.