I've posted about my sensory bucket before. My bucket may look familiar to you because it is a restaurant grade "bus boy" bucket! I got this from a friend after he closed his bar. You can buy them on amazon though; so don't worry they are easy to find!
This is Shaun's own design, he measured my bucket and with just a few screws, a saw and 2 by 4's he was able to make me this table. If you don't have a saw, Lowes or any home improvement store will cut it for you.