How about making some crafts with a helmet motif before Children's Day?
The heads of the nails look like helmet rivets, giving the design a brave and cute look.

*When printing the pattern sheet, please print at actual size. (The setting method varies depending on the printer.)
What you need
- Nails: 1 color
- Thread: 2 colors
- Board: 10×10cm 1 piece
Colors used in the example
- Nails: Brass
- Thread: Yellow, Blue