Given the choice between kids with simple toys and physicists, I’ll take the children every time. There is something elemental about children learning a new skill. They have to understand trajectory, momentum, judging speeds & accurate distances, bound orbits; and then teach their bodies to react precisely to intercept a bound orbit vector at speed and to furthermore cushion the landing of the ball to prevent it bouncing out of the cup again.
Small wonder we have so much trouble programming humanoid robots to do simple things children can do.