My kids were pretty little when we did Module 1, so they weren’t at the personal devotion stage. But now, they enjoy their personal devotions each morning, as well as any Bible we read during school time or as a family in the evenings. I mean, you can’t really have too much Bible, can you? 
The devotions my kids have been using since they were 7 are the God and Me books and Gotta Have God! books. They make them for age ranges and girls and boys. They are reading (Bible story or situational), answering questions, doing an activity, and then a book-led prayer at the end. My kids have written down some pretty profound stuff over the years in the answer blanks, so I know these books (however kiddie or twaddly they may appear) get them thinking. We have always bought ours at Mardel, but they are sold online as well.