Blog about the opposite side of the coin and discuss the disadvantages of day care. Discuss how frequently your child may get sick, separation anxiety, and how costly day care can be if you start from an early age. Most schools start kindergarten at the age of five and if you have more than one child, it can get costly. Day care can be a lot of work for mom, with the packing up of little homework assignments, supplies, lunch, drinks and snacks.