Cut two long skinny strips of red felt and hot glue the ends together into a “V” shape. Attach to the top with double sided fabric tape.
For the knee high stripes
Cut two long and wide strips of black felt that fits around the calf. Cut and hot glue two stripes of red felt along the top and bottom edge of the black strip. Attach these stripes around the calf near the top of the socks with double sided fabric tape.
For the backpack
Cut the top two corners of 2 sheets of green felt to be rounded. Cut wide strips of felt for the sides and bottom of the backpack and hot glue to the 2 larger panels. Cut green felt straps for the backpack and hot glue to the top and bottom edges of the back of the backpack.
Make the cat face backpack details from yellow, black, and red felt and hot glue onto the front of the pack. Cut a white rectangle for the front pocket and hot glue on.