This activity helps children understand why constellations exist and how sky myths are an integral part of humanity.
I replicated many constellations, trying to accurately represent the stars within using the stars I placed along the HR diagram.
I bought 4 different sizes of star-shaped hole punch (small, medium, large, extra large) and used red, yellow, white, and blue medium-weight paper to create the stars.
The pdf "Constellations" shows my HR diagram, a short description of different colors and sizes of stars in English and Dutch, and 14 constellations.
The HR diagram is a good resource for the different sizes of stars allowed, but I will summarize here.
Red: S, L, XL
Yellow: M, L, XL
White: S, M, L
Blue: L, XL

The pdfs "constellation activity" and "sterrenbeeld activiteit" explain a little about constellations and sky myths in English and Dutch.

I recommend also sharing lesser known sky myths. 
"Star Stories" by Anita Ganeri and illustrated by Andy Wilx is a lovely book with several translations.
Judy Volker's website is an extensive resource on sky myths (http://judy-volker.com/StarLore/English.html)
ALMA kids even did a short video about the dark constellations seen by the Atacameno people in the Milky Way (https://kids.alma.cl/en/looking-at-the-sky-with-talma/)

I got my hole punches on amazon (mostly because I couldn't figure out what they were called in Dutch) so I'll put the links below and you can hopefully find something similar where you live.
Small: https://www.amazon.nl/-/en/dp/B07QDWZ62P
Medium: https://www.amazon.nl/-/en/dp/B0164MS1DK
Large: https://www.amazon.nl/-/en/dp/B002ZXTFII
XL: https://www.amazon.nl/-/en/dp/B001HAMTVA

Younger children are much happier imagining their own constellations and older kids tend to want to re-create their star sign, but can be encouraged to try something new too.

This and more can be found on my website: AstrochemistVeronica.com
--Veronica Allen