We are a busy family of 6! My 6 and 4 year old are in school and I have my 20 month old twins who I need to be watched for some hours during the week and the occasional date night.
Dress the twins, take them to the park, library or downtown for a walk. Staying at home is fine but they need to be interacted and played with.
We live a few minutes walk feom downtown Livermore so we encourage walking, the twins love to play in the center of town.