Here are some things to work on for those wanting to practice their calligraphy.
The kanji character below is kabuto (helmet).
This next string of hiragana and kanji characters is Kodomo no Hi (Children's Day).
Here are a couple of possible sketches of Children's' Day carp streamers if you prefer to work with those.
Here is my demonstration painting of a helmet (kabuto), modeled on the one we have for our son.