My granddaughter is 8. She can put them together following the booklet enclosed without any adult supervision. The time it takes depends on how many pieces in the set. Probably kids differ in their speed. She loves the challenge. I currently have 3 new sets ready for her next visit.
I have not started this one with my five yr old grand daughter. The tree house legomwas way too hard and frustrating for her. We decided to make a park instead and she and I had much more fun with no frustration and lots of fun and her creativity.some pieces too little for her to use. Needs more coordination with small pieces.we do love Legos.our eight and ten year olds are Lego masters. Camper will probably take several hours of work. Enjoy