BubbleTrees are prefab, inflatable tents that appear to be comparable to jumpy houses for rich grown-ups. They run $9,000 to $17,000 depending on amenities such as wood floors or furniture. From Yahoo!Green:
How do they work? Just pump up a tent with the provided electric air blower. The blower, which has an air filter, circulates fresh air and provides the air pressure needed to maintain the bubble shape… Like ordinary tents, they can heat up quite a bit, so you'll want to install them in a shady spot during the summer.