This chore is the first you receive from your mother and it involves gathering 5 wooden toy cars lying around on your bedroom floor and droping them in the toy chest.
Each toy car has a completion value of 10%. The chore is complete after the behavior status bar has reached 50%.
You must drop the toy cars inside the chest, NOT on top of other toy cars, even if those are inside the chest already.
Otherwise, the game will not register your progress.