LOL - I'm glad you like them. I used to teach crafts, years ago. Actually, back when I was about your age. These days my business keeps me fairly busy. I don't know what your budget is like - that was usually my biggest limitation.
I was about 7 or 8 when I started doing counted cross stitch, very simple patterns. If you buy the larger even weave, (6 per inch) I would mark the squares I wanted them to cross stitch with a pen that would wash out, and then they could cross-stitch bookmarks, either with their name on them, or with Jesus on them. (Let me know if you need a pattern for that.
If anyone in your church has a badge-a-minute badge maker, the kids love being able to draw their own designs and then have them made up into personal buttons.
Simple pressed flower projects - like picking leaves and drying them, or flat flowers (things like pansies) Then you arrange them on poster board, (these make good placemats) and then when they are all arranged, add a layer of clear peel and stick plastic. (Like you cover books with. You can get it in any hardware store.)
Tie dyed tee-shirts can be a little more messy, you might want to stick with special fabric permanent markers for the kids to make their own designs with. Have simple designs for them to copy or trace if they want.
You could also have them create the "wordless book". Don't know if you are familiar with it... it's pages of construction paper, each page a particular color to tell a story. Black for sin, red for Christ's blood, white for how clean we are once we are washed clean. Don't remember all the colors... think there was also gold for the streets of heaven and green for new growth in Christ. I've also seen beaded bracelets with the same basic theme.
Have you tried doing a search on the web for children's crafts? That might give you lots of ideas.