If you want to start one first, Daily 5 would be the way to go. I think with your kindergarteners, you might feel more comfortable starting there. When you have that comfort level and your kids have built stamina and some independence, you can start CAFE at any time.
Are you all doing the book study together? I've posted the links below to the book studies for both books.
Daily 5 2nd edition--https://www.thedailycafe.com/app/webroot/uploads/files/Daily%205%20Book%20Study%20second%20edition.pdf
CAFE--
https://www.thedailycafe.com/legacy/public/file/CAFE+Book+Study+2.pdf