I guess they don't know how to swim. As you go into their park, there is a doll house with a little man sitting in it. He watches all day so they can't get out without him seeing them. When they can sneak out they go to the beach and pick up shells that they think are dollars. My grandma used to bake cookies and stuff, but I guess she forgot how.
Nobody cooks, they just eat out.
They eat the same thing every night - early birds. My Grandma says Grandpa worked all his life and earned his retardment.