There's no shortage of things to occupy the kids when the sun's shining, but what about when the weather won't play along? Before everyone starts climbing the walls, head undercover for some adrenalin-charged action-climbing and ice-skating, with some educational bits in between.
In case you're travelling in other directions, there are more fun options along the N1, around the Cape Peninsula and along the N2 in Somerset West, plus some outdoor activities for when the weather's being more obliging. All these venues are guaranteed to banish adult boredom as well. So go on, release your inner child.