Grown children often end up hosting a 70th, and most of these plans assume exactly that. They sort ideas by who is turning 70 (a mother, a father, any man or woman), then add photo shots, dinner menus, cake designs, decorations, gifts and themes for any budget.
Giant foil number balloons that drooped before the first guest arrived are why this party blog exists, and a hand pump still rides on top of my supplies bin. Michael E. Cheney is the pen name I write under, and these days nothing inflatable goes up more than 3 hours before my guests arrive. Here's the whole balloon story.