Espace Air Passion is an aviation museum at Angers-Marcé airport, with one of France's notable collections of light aircraft, gliders, and early flying machines. It is run with the energy of enthusiasts, and the restoration work is part of the appeal.
It is not in central Angers, but it is a worthwhile detour if you are interested in aircraft or travelling with children who like machines. Check opening times before setting out, as small specialist museums can keep limited hours.