Walk on the bubble wrap without popping any! It's harder than it looks.
Take a length of bubble wrap packaging material (available from any office supply store). The length should be around 4-5 feet long. The players take turns walking the length of the bubble wrap. The first one to walk the entire length without popping any bubbles is the winner. This game is not only fun but a mental challenge too as someone always finds a way of outsmarting the others.