This activity works on fine motor skills and color mixing. I feel this would be able to work this into a theme that dealt with winter. I would ask the Toddlers to create different snowflakes or different things they may see during winter time
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.