Why don't you just tell them not to play the video games? That is what I had to tell my son. At first he immersed himself in the video games and computers--it was tech overload! Once I told him "no more!", he discovered all the other really fun stuff the club/lab had to offer. He had a blast! By the end of the week I started allowing limited computer time and he often found himself not wanting the computers because he wanted to go make oobleck or play group games instead.