If it's 1/2" or thicker then you might be able to fix it. You will need the following tools and supplies. Wood glue and large clamps to hold the split joint and the seat. Make sure to put lots of glue use a small brush to spread the glue into all the cracks.Once it has been clamped make sure to wipe off all the glue with damp cloth. Leave it 8-24hrs to dry. I also use dremel, here is review about the best one https://drilling-it.com/dremel-4000-vs-dremel-4300/. Very usefulstuff in the house