Print the paper pattern and piece together with tape as per instructions. Cut around black lines to cut out dinosaur pattern. Cut out two dinosaurs from the fabric, each one facing the opposite direction.
Place the two fabric dinosaur pieces right sides together and pin along all outer edges, leaving the bottom of one foot open/unpinned. Make sure the triangle felt spikes are secure inside the fabric and do not come out of the fabric edge, you may need to fold them up inside. Sew all around, leaving the bottom of one foot open.