The add-on Mountable Spiders for Minecraft PE adds the ability to mount spiders. Now you can ride 5 spiders in our word like a horse and move faster than on your feet. It also looks very cool, you are moving on spiders. You can ride the following types of spiders: ender, sand, void, swamp and ice.
How can you ride a spider?
you must tame the spider first. Just feed him rotten flesh until you see red hearts under his head.
press the new MOUNT button and equip the spider with a saddle.