The reason players need to use the Education Edition of Minecraft if they want to make latex is they'll need the compound creator, which isn't available to players in any other version of the game. The compound creator allows you to combine different chemical elements to create items exclusive to the Education Edition — which also means you'll be able to make certain items not found in your traditional Minecraft world.

To make latex specifically, you'll want to combine five carbons and eight hydrogens, which is the chemical makeup of latex traditionally. As you are encouraged to stack items in the compound creator to make these new elements, you'll want to place a stack of five carbons next to a stack of eight hydrogens. Craft as many pieces of latex as you want to make the items you desire.