how to make a unlimited jungle tree sappling farm

so put some jungle wood down soon leaves will grow on this i tested it

2nd how to make a jail with no creative mode so make a area out of obsidian with floor and roof and put a redstone torch with a iron or no door

3rd how to make a trap

so you put a pressure plate with gravel or sand put tnt under it with a long hole so when they step on the plate the tnt ignites and falls with the gravel or sand on top of it