Is the scale of this indoor brazillion themepark correct?

I am trying to make a indoor Brazilian amusement park like these quirky small parks.

http://rcdb.com/9402.htm?p=0

http://rcdb.com/11268.htm?p=0

http://rcdb.com/11255.htm?p=0

Here is what i have so far.

Is the drop tower too big of a scale and the playground structure too tall?

Perhaps

I'm instead recreating this tiny coaster from Funny Days.

http://rcdb.com/9402.htm?p=0

Here's what I got so far.

[Coasterkidmwm]

I'm impressed they put a ride on a basketball court.

Here is the latest progress.

I have the floor started and one roof frame up. I have been working on the fence that separates the little kids play area from the floor hockey area.