The paper dolls are meant to be printed out on cardstock, and you can just use regular paper to print the clothing.
But to make these paper dolls sturdier and easier for your little ones to play with, you could back them with magnetic paper. This magnetic paper comes with adhesive on one side, so no gluing is necessary. Simply cut with scissors.
You could also get printable magnetic paper – and print the dolls right on on the magnetic paper.
Thanks Frugal Freebies