Besides Blocks, items are the basic elements in Minecraft Pocket Edition. Items can in general not be placed, although they can be used, planted, worn, farmed and so on.
See also Category:Blocks for the alternative.
Pages in category "Items"
“ Enchanted Books are Items that were added in Update 0.12.1. Enchanted Books can be obtained by...
“ Tipped Arrows are ammunition Items that were added in Update 0.15.0. They are sub-types of...