My oldest daughter gets so bored in church and I'm always trying to come up with new ideas to keep her quiet and busy. Another mom I know had made these 'puzzles' for her girls.
You can adapt this concept to use any pictures that will keep your kid happy and quiet and busy. I chose to use Religious pictures because that is what I would like my daughter focusing on while in church.
I bought these Magnetic Sheets but they weren't what I thought...I thought that the white would peel off and be sticky so I could adhere the pictures, but they didn't peel. So I had to Modge Podge my pictures onto the sheets of magnet.
They were kind of bubbling with the Modge Podge so I had to weight them down while they dried.
Then I cut them up...You could probably get more creative with your cutting designs but I went for simple.
You can go to the thrift store and buy a small cookie sheet and use it as a magnet board and stick it in your church bag.