This is a perfect surprise for the girls.. we got the 10 foot and for a 4 and 6 year old it’s prefect size ! 
Make sure when putting together you have the holes lined up right or you’ll be taking the top bars back off and that’s no fun! 
We put it together just as the directions said and it went together in about 2.5 hours! 
Super happy with our purchase.. thanks Wayfair!!