Just wanted to give a heads up to a potential problem I addressed. So in my testing of the deployment of the parachute over and over and the nature of my kids being curious of it somehow the lines became tangled over time. I simply untied the lines, untangled them and put back together. Then of course I tested again and noticed the lines going to parachute where not letting parachute spread fully open. All because under the force of the deployment I imagine that little black spacer was thrown down the line towards the parachute preventing the full opening. Now I can't remember if the knot was originally there or not but I have found it is pretty darn important to have one to prevent the spacer from getting tossed to far. Just something little I noticed thought I would pass it along.