Learning basic sewing with a polystyrene plate, yarn, + plastic needle. I remember doing this with craft mesh when I was a kid and then graduating to sewing buttons by hand onto little pillows and pockets.
Bubble Foam Sensory Activity - cup bubble bath + cup water and beat with a mixer. Love this idea since we have a TON of bubble bath to use up! Can make several batches and put food coloring in each one to make rainbow bubble foam!