A shapes tray!
My toddler (20mo) is really enjoying learning new things at the moment, and his little brain is like a sponge. So I thought we would look at some shapes. I collected together some objects from around the house that were clearly some of the elementary shapes and put them on a tray. We then spent a while identifying them and I got him to repeat the shapes back to me. Then he passed me a circle, and showed me a square etc. We read the shapes books too, and found the corresponding shapes on our tray. He was fascinated!
If you want to have a go, here are links to the supplies we used. Please note that these are affiliate links, which means that if you purchase the items here I get a small commission at no cost to you.