How can I make my younger brother's interest in physics at home? This is a soft question. I have a younger brother who is in 10th standard but he don't like subject of physics at all. When I asked reason for it he says he gets bored in mugging the formulas of physics theorem that are taught in his school. He don't like theortical explaination but when I explain it with any practical example,he understand it clearly. 
For example, to  show that light is made of different colors, I put prism .When light is passed through it , the white light gets spit into different colors.
It's like image is equal to thousand words. 
So can anyone suggest any experiment (not of any perticular theorem ) that can be possible to carry out at home or ourselves to make interest and increase interest in physics and physical phenomena so that children find it simple to study subject of physics ?
 A: 10th grade is 15/16 years old right? Even if i'm more for a theoretical approach I think that age should be the age of experiments. He clearly doesn't have the mathematical background to do "real" theoretical physics. They just probably try to shove formulas into his head without explanations. I advice you to keep going with these kind of experiments, maybe if you have time you can make them more quantitative in order to have an application of those formulas. You can show him conservation of momentum with some balls, you can show him conservation of angular momentum just with a rotating bar and some weights on it (you move the weights during rotation so the moment of inertia changes and consequently the angular velocity). Mechanics is probably the most boring field from an experimental point of view. If you get him interested in fluid dynamics or electromagnetism you could have way more fun I think. And as regards fluid dynamics, if his math is not good enough he's just like the best mathematicians and physicist in the world (Navier-Stokes equation).
About the theoretical part, I think you should make him appreciate the beauty of the formulas, trying to explain them to him, to make him guess what happens if you modify a physical quantity. Then do an experiment to see if he guessed right. In this way he'll learn he can make predictions out of formulas. Try to explain how fantastic those formulas are and where they come from, how they are not so banal. Like ${\bf{F}}=m\bf{a}$ is not an equation, it's not something to solve. It's the most basic principle of the whole classical mechanics. It relates 3 different quantities which may exist independently from the other ones, but nature put a restriction on them. 
To conclude. If it's just a teaching problem he may be (like the majority of the people in my opinion) inclined to physics without knowing it. You gotta consider the fact that he may be totally disinterested in it, in this case, forcing him to learn all that stuff my not be right in my opinion.
A: Tell him how to build an atomic bomb. Kids loves it. 
In principle:


*

*Start with a shocking and dangerous idea. 

*Show him an exciting experiment and explain this.

*Make him do something what requires new knowledge. 


For example:
Tell him about space exploration, that he can do it by himself,
build a model rocket with him,
Teach him the Newtonian dynamics and let him improve his rocket basing on his new knowledge.
