I’m thinking in a completely different direction. Here are some take/leave suggestions.
Bible story reading with narration afterward. Maybe even include writing three or four words on the board (names, descriptive words, etc.) to incorporate familiarity with reading/spelling those words (though I’d read the story to them to develop listening skills instead of having them read the story along with you.)
Goal: to hear and be able to tell/do the Word to someone else (parent, grandparent, neighbor, friend)
Copywork for Scripture memory verse to study during the week/month. This might include artistic embellishment.
Goal: to find beauty in the Word and hide it in their hearts. I’d maybe show examples of embellished Scripture. Maybe talk about the printing press early on to establish this idea…
Hymn study for the month (could be traditional song based on Biblical feasts, liturgical calendar, or praise and worship/VBS style song. Goal: to learn it by month’s end and sing for/lead parents during worship. You might also sing for residents at a nursing home. Take the party there. They’d love it!
Handicrafts could be to make small gifts for those in need. Say simple lap quilts, prayer shawls, bookmarks, pictures of Bible stories with simple frames to be delivered to nursing home residents.
Goal: incentive to serve others instead of becoming self centered on what do I get if I do this?
There are plenty of paintings and sculptures that could be utilized in a Sunday School setting.
Composers offer a vast amount of opportunities.
You might include nature study as part of your time once month, or have a nature study corner in the room for discussion.
Out of time. Maybe more later. HTH