Your local park district (or one in a neighbouring town) is a treasure trove of supervised Summer activities for kids. Depending on their ages and interests, you'll find camps for children who love sports, cooking, crafts, nature, superheroes, and so much more; one-off classes and activities; and even the occasional parent drop-off times (i.e. cheap babysitting). Some fill up almost immediately, but more specialised, shorter camps and activities tend to have availability well into the Summer season.