A pool noodle is a floatey device for kids ,walmart has them for $2. ,toy depart.,cut it up and place it in between were the broken spring has given way ,you can pull the seat in about 10 minutes are less. After all bolts are removed( 8 or 10 mm with a small extension),.... To take the seat out,the guide safety bar is the next step,pick up the seat and pull it forwards,this brings the seat off that bar and can then be removed out of the car.Once you have it out ,turn the seat upside down and youll see how this fix works. No need to replace the seat ,this is all you need to get that seat back into shape. Search this fix here and their is a pictorial on a DIY link.