Today, I am going to share ten activities for toddlers and preschool-aged children to learn about space or the solar system. These activities could keep your children occupied while you work on your space unit studies with an older child(ren).
My children were three and two years old when we did these activities.
Fine Motor Skills
Help your child cut out an orange circle for the sun. Then let them glue it to a paper and try cutting out rays.
We made some rockets using our duplos. 
You can let them experiment and make their own too!
Vocabulary
Math
Memory Game
I made up some space memory playing cards for my kids to enjoy. They are available in French and English and Turkish and English in my Teachers Pay Teachers store. I called out the names of the planets in one of the languages when the kids were turning the cards over.
Learning the planet names in French and English 
Bilingual Flashcards