We played on this at a birthday party and my son spent the whole time on it.We decided to buy one and put it in our basement. We measured out 50 feet, with the last 12 feet carpeted. It is the perfect amount  of space if it is indoors. We live in Ohio, with cold (indoor) winters , and this is a great active/gross motor  play toy that engages siblings to play together.They play on it a TON. I just wish I could , too!