Lads and Lassies Preschool 1001 Hinsbrook Ave, Darien, IL60561 Located at the Darien Swim and Racquet Club, the Lads and Lassies Preschool offers two groups to…More prepare your child for kindergarten. The first is for three and four-year-olds, the other is for four and five-year-olds. Lads and Lassies Preschool puts an emphasis on developing education and creativity for youngsters. The facility features a very large room that is perfect for conducting all sorts of activities. Children are also taken on field trips.