Dan my fabulous Grandson, I miss you so much. Reading all the tributes would take pages to repeat. I agree with them all. But one thing stands out-you had time to listen. You had time to listen to my ideas for a perpetual motion machine you listened you considered, even came up with some ideas of your own.it could work! You are my number one engineer with Vision a rare combination. I am heartbroken, from the day you were born you were different and you continued to push the boundaries. I miss your smile. I love you lots. Nan xxx. Ps the 2nd law of thermodynamics is not gospel !!!