Our couch is set up so that it has holes/gaps that legs and feet have gotten stuck in before. I would otherwise not disagree. She was doing back handsprings, front flips etc. I am deflating it now thanks to the feedback on this thread. Maybe I can throw it outside and make it a fun slip and slide this summer.
Lol. Make sure you secure the inflatable in place and that the area is free from anything that could poke it or children at either end if you use it as a slip and slide.
We couldn't get ours to stop doing gymnastics either, so we tried to keep them safe.
We had lots of stuff for them to do outside, so they were outside as much as possible. They were also in different kid activities (softball, baseball, basketball, soccer, cheer, and gymnastics plus they rode bikes, had a tree swing and a swingset, and liked to climb the tree).
In our basement, we had a stack of old mattresses (with a old foam mattress on top) that OG and YG would use as a little vault stack. Without a springboard, it was safe because they could only do forward rolls on it. (Plus, they could only use it when supervised.)
YG would pull her (4-inch thick foam) mattress off her bed to practice handstands and rolls, and stretch on it starting when she was 3. They wanted a beam, so their dad brought over a 6-foot-long 4x4. I covered it with carpet and attached 2x4 "feet" to it. They would use it on the carpeted floor for turns, jumps, balance stuff, and the occasional handstand or cartwheel.
Whenever they decided to do something they weren't permitted to do (front flips off the long low dresser to the mattress with some pillows and blankets (YG 4 yrs), suspending the beam between 2 kitchen chairs with couch cushions underneath, and a friend helping to stabilize the beam, to practice current L3 dismounts (OG 8 yrs and YG 5 yrs ... "spotted" by OG), or using the card table to practice squat ons (OG 9 yrs) ... with the friend holding the other side of the card table down), we would talk about WHY whatever it was it wasn't safe. Their coaches were informed about their antics too, so they could reinforce making safe choices.