We haven't been in our Montessori room for a few days, but here is what we're up to in the rest of the house.
I just made this for my youngest daughter. Cubes/Squares are a good challenge for her right now. Sometimes she gets the cube in the square at first try other times it can take two or three. I always find the multi shape boxes sold in stores, too overwhelming for children. I think the Montessori method of one shape at a time works best.
I liked the idea of her feeling for the shape (peeking too perhaps) but to give the activity a sensory element. The box is taped together.
I always like tips from others about what toys they use and toys that last the test of time. Here's one of ours: I bought these Melissa and Doug ice cream cones awhile ago. Everyone loves them and they are used all the time. They are magnetic- on the cone and with the scoop. Lots of fun.
I just love seeing my children play. My oldest daughter (and maybe because she had time being an only child) will play for an hour easily without stopping. I love hearing the little voice making her dolls talk and the toys out and arranged in her special way. I think play is so important. At this young age I like the mix of structured activity with educational value (like our Montessori time) and a lengthy play time. I think they are equally important.