We went with our 3 kids: 6yr, 4yr & 18mo. Easy to find, and approx 2hrs from Caen.
This is clearly a much-loved home, and the owners are very generous with it. Cider in the fridge on arrival, kitchen basics available (nice not to have to buy salt etc). Good communication before, and during our stay. Lots of information available for things to do.
The house and garden are much bigger than the photos suggest, and its in a lovely peaceful location. There are 3 large bedrooms: 2 upstairs and 1 downstairs, which wasn't ideal for us but would be OK if kids were older. The pool is unheated but has a hard semi-circular all-enclosing cover (think polytunnel) that warms it up a bit (& makes it safe for children).
Mortagne is a lovely town, with an indoor pool (need speedos not board-shorts), but the thing we most enjoyed about the area was cycling on the voie verte. Perfect for children, lovely scenery. We brought our own bikes but there are several at the property. You definitely need a car though, & cycling directly from the property is probably only for proper road cyclists.
Hanging out at the house after a bike ride, in the pool on warm days & playing in the oodles of inside & outside space, was really relaxing.
Highly recommended, many thanks