This is our Valentine's Day sensory box from last year. These boxes store very well, and the kids enjoyed having this one back out. It has a variety of noodles, rice, beans, rose petals, red scoops and bowls, and other miscellaneous red Valentine's Day gadgets.
I have found that I always have to have some sort of scoop and container for my 2-year-old. She loves pouring the contents from one thing to another.
In here, I also have a silicone heart tray. We play sorting games with this tray. For instance, I tell my 5-year-old to place all purple wagon wheels in the heart container, or place a certain number in each of the slots, or make a pattern with the beans, etc.