www.TumbleBookLibrary.com - K-6 children's ebook database
Direct Link: https://www.tumblebooklibrary.com/auto_login.aspx?U=tumble735&P=books
www.AudioBookCloud.com - This site is an audio book database for kids to adults, however the direct link below provides direct access to the children's section.
Direct Link: http://www.audiobookcloud.com/autologin.aspx?U=tumble2020&P=A3b5c6&categoryID=33
www.TumbleMath.com - K-6 math ebook database
Direct Link: https://www.tumblemath.com/autologin.aspx?U=tumble2020&P=A3b5c6