Suggest some interesting ideas for a working model for physics for a 9th grader.?

Some sort of heat engine (You can purchase a Stirling kit).

classification 9 little ones ought to understand approximately bells and all surprising?? So why do no longer you purely make an elementary electric powered bell?? (this is there in the ncert syllabus?) or you need to purpose a CONDUCTION attempt test!! information: Take a pencil and cut back it in a million/2(laterally) so thatthe lead interior is uncovered.. next take a battery advert connect one cord to the -ve area and one to +ve. the only by utilising one take samples like. a million.organic water 2.Salt Water 3.The cut back pecil etc. etc. and tutor what factors habit and which dont!! additionally attempt to income why they habit or dont habit.. for sophistication 9 it particularly is an A grade test!! {Physics in this is that unfastened electrons habit!!!}