FREEBIE: The common core standard K.NBT is for students to work with numbers 11-19 to gain foundations for place value. This can be tricky for kids who are just learning to count one to one objects. I suggest practicing this with real objects like unifix cubes and doing a lot of hands on modeling before giving students these practice sheets from Teacher Laura.
Play Create Explore: Baby Oil Sensory Bags = baby oil, food colouring, a little bit of water, glitter, objects to find (smooth). Put in ziplock bag and duct tape for leaks and little fingers who would like to open it.