Step one: purchase 2 fancy rodents (winter white mini hamsters). Allow children to name them Bugzy and Snowbell. Purchase deluxe cage and accessories, special mini hamster food and aspen pine bedding. Teach children not to squeeze them too hard and to pick up the ...ahem ... dropping they leave on the furniture.
Step two: purchase second type of animal in case they get bored with rodents. Pick aqua colored "wild" budgie along with cage (found) bird toys, food, vitamins and prepare him a raw food diet daily. Try to teach bird to be gentle and not bite children. Allow child #3 (husband) to name bird after favourite hockey player (Kovy). Make children promise to feed and clean cages.