This is an all inclusive resort with plenty of fun things to do! Check out their website if you'd like to see what the resort has to offer :)
https://www.royaltonresorts.com/resorts/splash-riviera-cancun
The city of Cancun is only a 30 minute ride from the resort, and there is plenty to do there.
There is also a small island called Isla Mujeres which is a short ferry ride from Cancun. This would be great for a day trip to do some exploring!
On the resorts website they have lots of suggestions for different tours and activities.
For the kids, there is a massive water park on the resort. For the adults, there is a swim up bar, a pool bar, and multiple beach bars.
You definitely will not run out of things to do!