I suggest the Grandstand. It is a very short walk to the main pool and Artists Pallete. It has it's own themed pool that should be good for your kids. A snack bar is also at the pool with a refillable mug station if you get those. Grandstand is also the first bus stop which with younger children, should be a big plus. The Springs is closer, but it is also the last bus stop so your choice of seating or even getting on the bus can be limited. Request next to the Grandstand pool.