My students keep their ATCs in one of these plastic sleeves for 3 ring binders. I love the grid and all the possibilities, like cross word puzzles or tic tac toe.1. I tore 1" blue masking tape into 1/2" strips and had students arrange them on watercolor paper cards as desired.
2. They colored over them with a crayon, which helped to add color and press down the tape.
3. The entire card was painted with liquid watercolor paint. Let dry.
4. Peel off the tape and place in a trading card sleeve, like this one found at Staples.
