Hey, Cecile; all three are lovely. I really like the way you went outside the square or frame on #1 and #2. And #3 is a fabulous frame, for a drawing, a photo, or whatever.
All 3 are great but your tic-tac-toe is my fave.
I love all three of your tiles but I have to agree with Daniele . . . The Tic Tac Toe one is my favorite too! Very original tiles!
They're all great, but I think I like your tic tac toe also! It's unique.
All three are very original, great job Cecile.
So fun to see all three efforts and you have completed the challenge beautifully!