yep, don would have approved of that. all materials used for construction will be thoroughly inspected, checked and certified by our quality engineers. let us know what you think in the comments below. use of symbols and the ability to communicate deep understanding with their use, is what being human is all about. i still hold the overall lead, but cousin sal continues to gain on me. no — it does need to be one adult to each child as the course is designed for both working together. that will be part of the study tour this year. 