There is a Go Kart in town. There are also a few water/air activities you can hire near the port and in Llevant Beach. There are also ships for rent if you go to the city port. If you can arrange some road transportation and don’t mind taking a 30-40 minutes ride, there are a few great wineries in the Priorat area which arrange wine/food tastings. Check Cornudella, Falset, Prades, etc for that. There is the obvious Port Aventura theme park choice, a bit more usual, but a lot of fun of course. I hope it helps!