Eventually we decided to have lunch by the lake. One car went to look for bbq chicken while the other car headed for the national library. There was no bbq chicken, not even for ready money, so gourmet treats were bought instead. We lunched watching the lake and passers by, then walked along the promenade looking for somewhere with coffee. We found it at Questacon. John bought some farting balloons much to the joy of the boys and the dismay of others there.