He'll challenge them as if they were armies to be conquered single-handedly by his little self. The same is true of the older child-there is a need for constructive activity. When my four children were young, I often kept them occupied with jobs which made them feel close to me. Cleaning day found them with their own little plastic buckets and sponges and a bit of soapy water. This kept them occupied while I, too, was cleaning.
Contests are fun.
I figured they had a lot of pent-up energy to express when they arrived home from school. Upon returning from school, each child immediately did one job and checked it off. This took place before I returned from work. I called them bite-size jobs. Even the baby learned to count this way.