Isaac's dream house

We live in a ranch home with three bedrooms, a basement and a garage. What do you think it means that my seven year old has concocted the following fantasy house for himself?

It is twelve stories high
You go in the front door and three steps this way, up you go to the circus room. There is also a zero gravity room up there.
Upstairs from the circus is the guest room, where you can have sleepovers. Across form the guest room is the spa and barbar shop.
After a massage in the spa, you can use some of the air from the zero gravity room to help you float on a slide into your bed.
Because above the spa are the bedrooms, one for me (Isaac) and Sam to share, one for Max, one for Mom and Dad.
Up above the bedrooms is a two story pool, so that there can be a very big deep end.
Across from that is an ice skating rink and a place to play pool.
Up the elevator from the pool is the garage where people can bring their car to get a whole new fancy redesign. They will pay me a lot of money for this because they will also get to use the fun rooms in the house while we work on their car.
I will also charge people to use my house for birthday parties. They can use the circus rooms, pool, ice skating rink and they can play pool. I will make them a cake, too. The kitchen is just above the garage.
At the top of the house is a sunbathing deck. You press a button on a remote to open up the roof and let the sun come in. Another button allows you to dive off the top of the house into the pool. After you press the button, the pool slides out of the side of the house like a drawer opening in a bureau, and then you dive down into it. Beneath the pool is the vegetable garden, and when you make a big splash and water comes out of the pool, it falls on the garden below and waters the vegetables and helps them to grow.
In the house there will be a housekeeper, a cook, a gardener, a lifeguard who also works in the garage, a barber and spa people.

Tell me please: where did this child come from?