Through the Skeleton Keyhole - Stanley Wood

A story about an assisted care facility that they referred to as the institution and the caregiver as the guards if their children request they will be locked at night in their rooms. They learn to go in and out through the skeleton keyhole, and when out, a limousine is waiting for them. There's an AI aboard that asked where they would like to go. They go on many different adventures and find themselves in a lot of predicaments, some fun, some dangerous.