What if destroying a wood block had a .2% chance of leaving behind a sap block? Tree sap is a liquid block. It flows very slowly. You can collect it in a bucket. Every tree has it's own color sap. Stepping in sap makes you move very slowly, entities too, and blocks being pushed by pistons or conveyor belts.
Maple Trees are a beautiful and rare addition to Minecraft. Nothing special about them except they are used to make rubber.
Smelting a bucket of tree sap can give you one of two results. If it's maple tree sap, you get a bucket of syrup. Syrup, like milk, cannot be placed. If the tree sap is not of a maple tree, you get rubber and the bucket of sap is replaced with an empty bucket.
Pancakes can be crafted by placing 3 buckets of syrup ontop of 3 wheat. You get back three empty buckets. A pancake is not stackable and heals 8 hearts when eaten.
Rubber can craft a rubber block or a conveyor belt. A rubber block is crafted by placing 4 rubber in a square. A conveyor belt is crafted by placing 3 rubber on top and the rest are 6 iron ingots.
A conveyor belt looks like an iron block, but the top half is a conveyor belt. When placed, it faces towards you and pushes blocks, entities, and mobs in that direction.
When landing on a rubber block, you bounce up in the air 1/2 the number of blocks you fell. You do not recieve fall damage.