Liam likes water play. I get a big bowl and some water toys and let him go. That is his big thing right now.
I was an Infant/Toddler teacher when I was an undergrad so I have a whole card catalog of ideas that I pulled out of storage.
We fingerpaint (edible paint) and make forts. I made some sensory bins, "squishy bags", and Science/Discovery Bottles.
There are alot of fun ideas on Pinterest! They have recipes and describe alot of activities in depth.