If you’re looking for magazines that take submissions, here’s what I’ve used:
The Book is a downloadable PDF, free to members of SCBWI, and includes magazines as part of its market listings. The Book is updated every year.
The Children’s Writer’s and Illustrator’s Market guide also has magazine markets as part of its listings and is also updated every year. It’s not free but can often be found the in the library. The future of this guide is a bit uncertain, as its publisher recently declared bankruptcy, but the 2019 edition is out there!
Magazine Markets for Children’s Writers is similar to the other two, but because its focus is only magazines, it also has listings for children-adjacent magazines, such as parenting magazines and magazines for teachers. I’ve never found it in my library, but at $21.95, it won’t break the bank too much.
Evelyn B. Christensen is an author and an incredibly generous soul because she keeps free listings on her websites to help out other writers. Thank you, Evelyn!
With any guide, I’d recommend it only be a starting point. Magazine publishing changes too fast for guides–especially the print ones–to keep up, especially when it comes to submission calls. Use the guide to identify a magazine that interests you, then follow up with the publisher’s website to find its guidelines, submission calls, and contract terms.