1. A house made of building blocks looks beautiful, but it will collapse inadvertently.

2. Colored building blocks, including long, short, square, and round, can be used by my brother to build houses, bridges, or even a small factory.

3. Once, I held my breath while building the blocks, for fear that they would fall over, because it was built with all my hard work.

4. I held my breath while building the blocks, afraid that he would fall down, because then my efforts would be in vain.

5. Stack up colorful building blocks to create a piece of happiness; climb the beautiful slide to slide away a little sadness; draw beautiful pictures to create a wonderful scene; hum sweet songs and sing A hint of childlike innocence. Children's Day is here. May you and your children enter their world again and feel the beauty of childhood again!

6. I held my breath while building the blocks, afraid that he would fall down, because then my efforts would be in vain.

7. When I build Lego blocks at home, I can always quickly build a very complex model. This is why practice makes perfect.

8. I held my breath while building the blocks, for fear that they would fall over. I felt the same as Yang Jun.

9. Stack up colorful building blocks to pile up a piece of happiness; climb the beautiful slide to slide away a little sadness; draw beautiful pictures to draw a wonderful scene; hum sweet songs and sing A hint of childlike innocence. Children's Day is here. May you enter the world of children again and feel the beauty of childhood again.

10. I held my breath while building the blocks, for fear that they would fall over. I felt the same as Yang Jun.

11. I pieced together a set of car building blocks.

12. Our feelings are like building blocks. They are fragile but ever-changing. They are like homes built with all our efforts, but they may collapse in the next second.

13. Stack up colorful building blocks to pile up a piece of happiness; climb the beautiful slide to slide away a little sadness; draw beautiful pictures to draw a wonderful scene; hum sweet songs and sing A hint of childlike innocence. Children's Day is here. May you enter the world of children again and feel the joy of happiness again.

14. When Ron was a child, he liked building blocks and playing with construction toys, but he was not particularly fond of making objects.

15. I admit that I don’t have any creative ideas this time...I made a very common wooden building block, made of solid wood, cut the corners with a band saw, and glued it with white glue.