Hi Lyn, you better be careful with that one lol!! Don't want any pinches. I would retire it and get a new one. But you could try Gorilla epoxy
You can try an epoxy glue, but it might be time to buy a new one.
I would just suggest getting a new one. It would make it really difficult to keep it sanitary once it's fixed. Plus I would be afraid of it breaking again in the future.
I agree buy a new one, better than painful pinches.
Just buy a new one, inexpensive ones for around $10. You will spend more on the repair than a new seat!
This one has fish and shells embedded in it. Was around $60 when I bought it.