Ok I know its about 2 kids and there uncle in a castle and the go to a magical land and the main nessy is happieness and there are other nessy and it like nessy lagoon? Please help

Eurekas castle maybe?

Ok i know its about 2 kids and there uncle in a castle and the go to a magical land and the main nessy is happieness and there are other nessy and it like nessy lagoon?? please help

The Family Ness ;)

Wimzie's House