I first set a wooden board on top of the toddler sensory table to support the apparatus. The board was longer than the table so the box I used fit nicely on top.
I used strips of cardboard to make walls for the channels. I used a separate strip that was taped to each of those strips to hold the channels in place.
I attached a cardboard chute to the end of the channel apparatus. So the chute would keep its shape, I used a cardboard strip taped across its width.
This is what the apparatus looked like from the side. I set up the chute on one end of the channel apparatus to empty into a white washtub. I had to adjust the washtub's height otherwise the tub would not rest on the floor. I adjusted the height by taping a plastic tray underneath the washtub.
In the picture below, the toddlers are working on three different levels. They are working with cracked corn in the channels, on the chute and in the tub at the bottom of the chute.
Why would I even entertain the idea of building apparatus at the sensory table for toddlers? For the very same reason I built apparatus for the preschool children. Interesting and intriguing spaces encourage unique types of play and exploration that fuel the fire for all subsequent learning. Put another way, play and exploration is a generative process that nourishes more play and exploration, which are both vital staples for all children.