Family vacation to smoky mountains tn?

we are planning a trip to smoky mountains tn this july we already found a nice cabin with a big pool for the hot days we are only staying 2 nights the problem is that there will be two toddlers so trails and rafting are out what can we do to make the vacation fun for them too? we were thinking about a side trip to fun mountain since it has something for everyone and is not really big other than that is there some things around the cabin we can do for them? my husband was thinking of a parachute you know the 10 ft thing that is great for everyone any ideas would be nice thanks