Assemble the Block
1. Sew together one muslin A triangle, one muslin A reversed triangle, and one pink print B triangle to make a pieced star point (Diagram 1). Press the seam allowances toward the B triangle. Repeat to make a second pieced star point. Then, using the remaining muslin A pieces and the blue print B triangles, make an additional two pieced star points.
2. Sew together two pink print triangles and two blue print triangles in pairs (Diagram 2). Press the seam allowances open. Then join the pairs to make the pieced star center. Press the seam allowance open.
3. Lay out the star center, star points, and muslin 2-1⁄2" squares (Diagram 3). Sew together the pieces in each row. Press the seam allowances in one direction, alternating the direction with each row. Then join the rows to make a block (Block Assembly Diagram). Press the seam allowances in one direction.