Eight-year-old Dallin Cunningham, inset, died last year on the playground ... soft enough. There was not enough mulch below the slide to act as an appropriate buffer to absorb the impact of a fall.

Erik Mills, owner of Play Grounds of La Crosse, walks the warehouse space on Thursday, Feb. 6. Mills, who also owns two escape rooms in La Crosse, said he was inspired to open the indoor playground ...