I was looking at those, wondering if there is another style that may help open it to. Only looking for safety ones. Being 20 lbs seems kinda heavy for a toddler maybe not I was a strong kid.Do a search for safety toy box hinges or something similar. They prevent such a lid from slamming down hard, and will hold the lid open so one can search the contents with two free hands. One version: http://www.rockler.com/product.cfm?page=30958&site=ROCKLER
here is how you find out what you need, weight the lid and measure the frount to back of the lid here is the formila the link also http://www.rockler.com/basket/wizard_torsion.cfmI just built this toy box. The lid is weighing in at 20lb wondering what hinges are the best out there thanks.