Well I can give you a common list, but you know, most of them are explanation and diagrams..best carry a board to demonstrate...still for experiments :
book on table (friction, force, motion, inertia)
for inertia you can give objects of different weights
elastic/rubber ball - deform it to show potential energy, or gravitation experiments
toys that can be wound - potential and kinetic energy
tuning forks, strings for waves
flute or organ instrument to show superposition of waves
small container (transparent) with soapy water, certain objects like pins (that sunk in container with plain water) will float in it.
but u must remember, explanation is the most important!
source : ICSE Board, India