First, put a little glue onto the leg. Next, insert the lag bolt, with the washer on it, through the hole in the seat. The next step is to screw the lag bolt into the leg. Once the leg is drawn up good and tight take the fennel and screw it into the pre-drilled hold in the bottom of the leg. Again a layer of glue.
Final step is to apply the hand strap.
All that for under ten bucks.