I have combined the challenge on Charisma Cardz that was Getting Sporty to use a sports theme and the challenge on Creative Card Crew to Decorate the inside of your card and also the challenge on 365 Cards for Day 20 that was Inside Out to make a card mostly embellished on the inside and leave the front nearly blank.
Here is my card. Very simple little soccer card with a window on the front. Printed paper is DCWV; puffy soccer ball is Boley; other stickers are Keepsake and chipboard glitter star is Colorbok. TFL