The apple seeds cafe and boutique is open to the public and a fun place for parents with little kids.
If you'll be in town for a longer stay, you might want to consider checking out their class schedule for kids 0-3. There are tons of classes from art to sports.
The rest of the facility is available only to members. It includes a 2,500 square foot playground with soft play climbing area and shape sorter "garden. There's a fun deli, NYC taxi and apartment building as well as our LegoTM area and magnet wall and a sports playground with basketball nets and soft gym equipment.
I heard they now have concerts on Sundays. Included with the price of admission is an all-day playground pass. This place is super clean and the staff is really friendly. The boutique has so many great items including toys, books and clothes. You can even get a kids hair cut there in the salon.