A Big Boy Now!

I am a little sad but I painted Fredy's baby room this weekend. I was tired of the frogs after 5 years and he is no longer a baby. I decided to do sport balls as the theme since he is so into them, especially basketballs. I am finished for the most part. I still need to find a twin bed for him and put up two more basketballs hoops.
I am having a hard time with the ball boarder. I bought some balls that are suppose to go into the bathtub and tried to put them up on the wall with Velcro. I could not find a glue that would bond the rubber of the balls with the back of Velcro. I know you are asking, "What about the self stick Velcro?" That was my first try...too heavy. Next I tried hot glue...nope. Now I have a combo of super glue and quick grip. My next move, if that does not work, is Gorilla Glue. Each morning I go into his room and look at the boarder to see what ball has fallen off the wall during the night.