He played with this on and off over the day, particularly if I would touch anything in the tub. As the day wore on and interest was dwindling, I removed all the kitchen items, except the spoon and added in some little containers with lids. He filled the containers, closed the lid and shook them. At one stage he was banging them together.
This was utilised a fair bit over the day, so I will be attempting a few more sensory tubs.