To save time and money, you can use Space pictures, posters, clipart, and other space imagery to make all sorts of cool decorations and homemade themed party items for your child's birthday party.
For instance, give this search a go and you'll find lots of great Space imagery:
There's so much cool stuff you can do with these images!
You can also hang these great Space posters around the house to create a special party atmosphere. The posters are also great to give out as party favors to the guests or keep hanging on the wall long after the party is over!